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  <xs:element id="wdq_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueForfeitures" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueForfeitures" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_CommodityContractContractTwoMember" abstract="true" name="CommodityContractContractTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationDisclosureTextBlock" abstract="false" name="ReverseRecapitalizationDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="wdq_FinancingReceivablePercentageOfRevenueBasedDistributionsEntitledToReceive" abstract="false" name="FinancingReceivablePercentageOfRevenueBasedDistributionsEntitledToReceive" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_PaymentsOfAmortizationQuarterly" abstract="false" name="PaymentsOfAmortizationQuarterly" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NumberOfVehicles" abstract="false" name="NumberOfVehicles" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_StaffingManagementServicesAndOfficeCostsMember" abstract="true" name="StaffingManagementServicesAndOfficeCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_AssetRetirementObligationMeasurementInput" abstract="false" name="AssetRetirementObligationMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="wdq_OpalA2TermLoansMember" abstract="true" name="OpalA2TermLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PreferredStockConversionPrice" abstract="false" name="PreferredStockConversionPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityToBePaidYearOne" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NoncontrollingInterestNumberOfSubsidiariesWithNoncontrollingOwnership" abstract="false" name="NoncontrollingInterestNumberOfSubsidiariesWithNoncontrollingOwnership" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_IncreaseDecreaseInTemporaryEquityUnitsRollForward" abstract="true" name="IncreaseDecreaseInTemporaryEquityUnitsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wdq_DerivativeInstrumentContingentConsiderationLiabilityPeriod" abstract="false" name="DerivativeInstrumentContingentConsiderationLiabilityPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="wdq_FinancingReceivableStatedInterestRate" abstract="false" name="FinancingReceivableStatedInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationWarrantLiability" abstract="false" name="ReverseRecapitalizationWarrantLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NumberOfWhollyOwnedSubsidiaries" abstract="false" name="NumberOfWhollyOwnedSubsidiaries" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_InterestPaidCapitalizedInvestingActivitiesNetOfEquityMethodInvestmentAdditionalInvestmentToParentRepresentingCapitalizedInterest" abstract="false" name="InterestPaidCapitalizedInvestingActivitiesNetOfEquityMethodInvestmentAdditionalInvestmentToParentRepresentingCapitalizedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_RelatedPartyTransactionServiceFeesFixedAnnualPaymentAmount" abstract="false" name="RelatedPartyTransactionServiceFeesFixedAnnualPaymentAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_IncreaseDecreaseInTemporaryEquityAmountRollForward" abstract="true" name="IncreaseDecreaseInTemporaryEquityAmountRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wdq_NumberOfElectricityForwardSalesAgreements" abstract="false" name="NumberOfElectricityForwardSalesAgreements" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_CommodityContractContractOneMember" abstract="true" name="CommodityContractContractOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiability" abstract="false" name="OperatingAndFinanceLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_FuelProviderAgreementsFPAsMember" abstract="true" name="FuelProviderAgreementsFPAsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PineBendSunomaAndNobleRoadMember" abstract="true" name="PineBendSunomaAndNobleRoadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PreferredStockDividendRateEventOfDefaultIncreaseForEachEventPercentage" abstract="false" name="PreferredStockDividendRateEventOfDefaultIncreaseForEachEventPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_VariableRateFixedMarginPeriodThreeMember" abstract="true" name="VariableRateFixedMarginPeriodThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_NonrecurringIncomeExpense" abstract="false" name="NonrecurringIncomeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NumberOfFacilitiesOperational" abstract="false" name="NumberOfFacilitiesOperational" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_BeaconMember" abstract="true" name="BeaconMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_VariableInterestEntityNumberOfEntities" abstract="false" name="VariableInterestEntityNumberOfEntities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_PreferredStockConversionVolumeWeightedAveragePricePeriod" abstract="false" name="PreferredStockConversionVolumeWeightedAveragePricePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="wdq_PartsMember" abstract="true" name="PartsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_TruStarRevolverCreditFacilityEffectiveSeptember2021Member" abstract="true" name="TruStarRevolverCreditFacilityEffectiveSeptember2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_TruStarRevolvingCreditFacilityMember" abstract="true" name="TruStarRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationNewLeases" abstract="false" name="FinanceLeaseRightOfUseAssetAfterAccumulatedAmortizationNewLeases" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_RenewableNaturalGasFuelSupplySegmentMember" abstract="true" name="RenewableNaturalGasFuelSupplySegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_TemporaryEquityAccretionOfDividendsAttributableToCommonStockholdersBasic" abstract="false" name="TemporaryEquityAccretionOfDividendsAttributableToCommonStockholdersBasic" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_DerivativeContractPriceAverage" abstract="false" name="DerivativeContractPriceAverage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:monetaryPerEnergyItemType"/>
  <xs:element id="wdq_CommodityContractContractFourMember" abstract="true" name="CommodityContractContractFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PreferredStockConversionSecondYearDiscountPercentage" abstract="false" name="PreferredStockConversionSecondYearDiscountPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_OperatingLeaseAndFinanceLeaseLiabilityUndiscountedExcessAmount" abstract="false" name="OperatingLeaseAndFinanceLeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityCurrent" abstract="false" name="OperatingAndFinanceLeaseLiabilityCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestedPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestedPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_AdministrativeServicesAgreementMember" abstract="true" name="AdministrativeServicesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ArcLightClassACommonStockMember" abstract="true" name="ArcLightClassACommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PineBendMember" abstract="true" name="PineBendMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_NumberOfLeasesLeaseTermExtended" abstract="false" name="NumberOfLeasesLeaseTermExtended" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_InterestRateSwap2Member" abstract="true" name="InterestRateSwap2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_VariableInterestEntityNumberOfEntitiesConsolidated" abstract="false" name="VariableInterestEntityNumberOfEntitiesConsolidated" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_ForwardPurchaseAgreementMember" abstract="true" name="ForwardPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantDebtToWorthRatioMaximum" abstract="false" name="DebtInstrumentCovenantDebtToWorthRatioMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_RedeemableNoncontrollingInterestMember" abstract="true" name="RedeemableNoncontrollingInterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PaymentsOfTransactionCostsAndUnderWritingFees" abstract="false" name="PaymentsOfTransactionCostsAndUnderWritingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_InterestRateSwap1Member" abstract="true" name="InterestRateSwap1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_SponsorEarnoutSharesMember" abstract="true" name="SponsorEarnoutSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DebtInstrumentPeriodicPaymentAdditionalAmount" abstract="false" name="DebtInstrumentPeriodicPaymentAdditionalAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_TaxReceivableAgreementDiscountRate" abstract="false" name="TaxReceivableAgreementDiscountRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_NumberOfAgreementsAmendedWithMinimumVolumeRequirements" abstract="false" name="NumberOfAgreementsAmendedWithMinimumVolumeRequirements" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_OpalTermLoanIIMember" abstract="true" name="OpalTermLoanIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PreferredStockDividendRateEventOfDefaultMaximumAfterIncreasesPercentage" abstract="false" name="PreferredStockDividendRateEventOfDefaultMaximumAfterIncreasesPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsNetPeriodicSettlements" abstract="false" name="DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsNetPeriodicSettlements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ContingentLiabilityPayableToNoncontrollingInterestMember" abstract="true" name="ContingentLiabilityPayableToNoncontrollingInterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_StockholdersExcludingOpalFuelsStockholdersMember" abstract="true" name="StockholdersExcludingOpalFuelsStockholdersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DerivativeInstrumentContingentConsiderationLiabilityEBITDATrigger" abstract="false" name="DerivativeInstrumentContingentConsiderationLiabilityEBITDATrigger" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OpalTermLoanIIDelayedTermLoanDDTLFacilityMember" abstract="true" name="OpalTermLoanIIDelayedTermLoanDDTLFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ScheduleOfReverseRecapitalizationTableTextBlock" abstract="false" name="ScheduleOfReverseRecapitalizationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="wdq_TemporaryEquityAccretionOfDividendsAttributableToParent" abstract="false" name="TemporaryEquityAccretionOfDividendsAttributableToParent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ManagementServicesAgreementMember" abstract="true" name="ManagementServicesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_WarrantsPolicyTextBlock" abstract="false" name="WarrantsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="wdq_SunomaMember" abstract="true" name="SunomaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PreferredStockConversionFirstYearDiscountPercentage" abstract="false" name="PreferredStockConversionFirstYearDiscountPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityNoncurrent" abstract="false" name="OperatingAndFinanceLeaseLiabilityNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantPeriodTwoMember" abstract="true" name="DebtInstrumentCovenantPeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ThreeCustomersMember" abstract="true" name="ThreeCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_RestrictedCashCurrentInterestReserve" abstract="false" name="RestrictedCashCurrentInterestReserve" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_TwoCustomersMember" abstract="true" name="TwoCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_StockIssuedDuringPeriodSharesReverseRecapitalization" abstract="false" name="StockIssuedDuringPeriodSharesReverseRecapitalization" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wdq_NoncashBusinessCombinationFairValueAdjustmentsOfPutOptionOnForwardPurchaseAgreement" abstract="false" name="NoncashBusinessCombinationFairValueAdjustmentsOfPutOptionOnForwardPurchaseAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_LegacyCommonUnitsMember" abstract="true" name="LegacyCommonUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ParentEquityAwardsMember" abstract="true" name="ParentEquityAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ComprehensiveIncomeLossAvailableToCommonStockholders" abstract="false" name="ComprehensiveIncomeLossAvailableToCommonStockholders" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NumberOfFacilitiesNotYetOperational" abstract="false" name="NumberOfFacilitiesNotYetOperational" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_TemporaryEquityAmortizationOnPaymentToAcquireNonRedeemableNoncontrollingInterest" abstract="false" name="TemporaryEquityAmortizationOnPaymentToAcquireNonRedeemableNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityToBePaidYearTwo" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_RepaymentsOfLongTermLinesOfCreditWorkingCapitalFacility" abstract="false" name="RepaymentsOfLongTermLinesOfCreditWorkingCapitalFacility" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NumberOfFuelStations" abstract="false" name="NumberOfFuelStations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantPeriodOneMember" abstract="true" name="DebtInstrumentCovenantPeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityToBePaidYearFour" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationPutOption" abstract="false" name="ReverseRecapitalizationPutOption" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_SupplyCommitmentPlanToSellMinimumPercentage" abstract="false" name="SupplyCommitmentPlanToSellMinimumPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_ClassOfWarrantOrRightPercentageOfOutstandingWarrants" abstract="false" name="ClassOfWarrantOrRightPercentageOfOutstandingWarrants" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_PowerPurchaseAgreementsMember" abstract="true" name="PowerPurchaseAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_Block2OpalEarnoutSharesMember" abstract="true" name="Block2OpalEarnoutSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DerivativeInstrumentMinimumAnnualElectricOutput" abstract="false" name="DerivativeInstrumentMinimumAnnualElectricOutput" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:energyItemType"/>
  <xs:element id="wdq_NumberOfNaturalGasProducers" abstract="false" name="NumberOfNaturalGasProducers" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_RestrictedCashCurrentJointVentureEquityContribution" abstract="false" name="RestrictedCashCurrentJointVentureEquityContribution" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationPercentageOfCommonStockSubjectToVestingAndForfeitureConditions" abstract="false" name="ReverseRecapitalizationPercentageOfCommonStockSubjectToVestingAndForfeitureConditions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_ProceedsFromAcquisitionOfEquityMethodInvestmentsCashAcquired" abstract="false" name="ProceedsFromAcquisitionOfEquityMethodInvestmentsCashAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_TemporaryEquityRedeemableNoncontrollingInterestIncreaseFromContributions" abstract="false" name="TemporaryEquityRedeemableNoncontrollingInterestIncreaseFromContributions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_EnvironmentalProcessingFeesMember" abstract="true" name="EnvironmentalProcessingFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_CompressedNaturalGasRenewableNaturalGasFuelingStationsMember" abstract="true" name="CompressedNaturalGasRenewableNaturalGasFuelingStationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_AssetAcquisitionEquityInterestsIssuedOrIssuableNumberOfShares" abstract="false" name="AssetAcquisitionEquityInterestsIssuedOrIssuableNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wdq_ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest" abstract="false" name="ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_VariableRateFixedMarginPeriodTwoMember" abstract="true" name="VariableRateFixedMarginPeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_TransmissionDistributionInterconnectionMember" abstract="true" name="TransmissionDistributionInterconnectionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_CommodityContractContractFiveMember" abstract="true" name="CommodityContractContractFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DebtInstrumentMaximumBorrowingCapacityForExtendedAvailabilityPeriodAmount" abstract="false" name="DebtInstrumentMaximumBorrowingCapacityForExtendedAvailabilityPeriodAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_WeightedAverageRemainingLeaseTermAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wdq_PreferredStockDividendRateIfFailedToRedeemMaximum" abstract="false" name="PreferredStockDividendRateIfFailedToRedeemMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_OfficeSpaceMember" abstract="true" name="OfficeSpaceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationCommonStockSubjectToVestingAndForfeitureConditionsPeriod" abstract="false" name="ReverseRecapitalizationCommonStockSubjectToVestingAndForfeitureConditionsPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationDerivativeInstrumentContingentConsideration" abstract="false" name="ReverseRecapitalizationDerivativeInstrumentContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_StockIssuedDuringPeriodValueConversionOfWarrants" abstract="false" name="StockIssuedDuringPeriodValueConversionOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_DerivativeInstrumentContingentConsiderationLiabilityShares" abstract="false" name="DerivativeInstrumentContingentConsiderationLiabilityShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wdq_CommodityContractContractSixMember" abstract="true" name="CommodityContractContractSixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_StockIssuedDuringPeriodSharesConversionOfWarrants" abstract="false" name="StockIssuedDuringPeriodSharesConversionOfWarrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wdq_RevenuePercentage" abstract="false" name="RevenuePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_ProfitInterestsMember" abstract="true" name="ProfitInterestsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantPeriodAxis" abstract="true" name="DebtInstrumentCovenantPeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="wdq_OpalTermLoanIIDebtServiceReserveDSRFacilityMember" abstract="true" name="OpalTermLoanIIDebtServiceReserveDSRFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityToBePaidYearThree" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseRightOfUseAsset" abstract="false" name="OperatingAndFinanceLeaseRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_DerivativeInstrumentContingentConsiderationLiabilityPrice" abstract="false" name="DerivativeInstrumentContingentConsiderationLiabilityPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="wdq_VariableInterestEntityOtherLongTermLiabilitiesNoLongerLiable" abstract="false" name="VariableInterestEntityOtherLongTermLiabilitiesNoLongerLiable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardUnvestedPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardUnvestedPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_OpalA2TermCommitmentsMember" abstract="true" name="OpalA2TermCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DerivativeNumberOfAdditionalInstrumentsHeld" abstract="false" name="DerivativeNumberOfAdditionalInstrumentsHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_DebtInstrumentPrepaymentPenaltyPercentage" abstract="false" name="DebtInstrumentPrepaymentPenaltyPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_LossOnExchangeOfWarrants" abstract="false" name="LossOnExchangeOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_TemporaryEquityNoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" abstract="false" name="TemporaryEquityNoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_RightOfUseLiabilitiesObtainedInExchangeForFinanceLeaseLiabilityCurrent" abstract="false" name="RightOfUseLiabilitiesObtainedInExchangeForFinanceLeaseLiabilityCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_FinancingReceivableStatedInterestRatePortionPayableInCash" abstract="false" name="FinancingReceivableStatedInterestRatePortionPayableInCash" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_NumberOfLeases" abstract="false" name="NumberOfLeases" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_OperatingLeasesModificationsNumberOfLeases" abstract="false" name="OperatingLeasesModificationsNumberOfLeases" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_CommodityContractContractThreeMember" abstract="true" name="CommodityContractContractThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_MeasurementInputCostOfCapitalMember" abstract="true" name="MeasurementInputCostOfCapitalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_SponsorLetterAgreementMember" abstract="true" name="SponsorLetterAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationAbstract" abstract="true" name="ReverseRecapitalizationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wdq_NaturalGasRenewableMember" abstract="true" name="NaturalGasRenewableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DebtInstrumentConvertiblePercentageOfOutstandingAmountConverted" abstract="false" name="DebtInstrumentConvertiblePercentageOfOutstandingAmountConverted" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_BusinessAcquisitionTransactionCostsSponsor" abstract="false" name="BusinessAcquisitionTransactionCostsSponsor" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_TemporaryEquityDistributionsToRedeemableNoncontrollingInterestHolders" abstract="false" name="TemporaryEquityDistributionsToRedeemableNoncontrollingInterestHolders" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_PrepaymentOfShareOfEquityContributionInJointVenture" abstract="false" name="PrepaymentOfShareOfEquityContributionInJointVenture" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_EquityMethodInvestmentAcquisition" abstract="false" name="EquityMethodInvestmentAcquisition" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OperatingAndFinanceLeaseLiabilityToBePaid" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_VariableRateFixedMarginPeriodOneMember" abstract="true" name="VariableRateFixedMarginPeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_AmortizationOfPowerPurchaseAgreementLiability" abstract="false" name="AmortizationOfPowerPurchaseAgreementLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_BrownGasMember" abstract="true" name="BrownGasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_SeniorSecuredCreditFacilityDebtReserveAndLiquidityFacilityMember" abstract="true" name="SeniorSecuredCreditFacilityDebtReserveAndLiquidityFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_GuaranteeFeesMember" abstract="true" name="GuaranteeFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_IncreaseDecreaseInTemporaryEquityAndRedeemableNoncontrollingInterestAbstract" abstract="true" name="IncreaseDecreaseInTemporaryEquityAndRedeemableNoncontrollingInterestAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wdq_OtherDerivativesMember" abstract="true" name="OtherDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantPeriodDomain" abstract="true" name="DebtInstrumentCovenantPeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_OmnibusAndConsentAgreementTheFM3AmendmentMember" abstract="true" name="OmnibusAndConsentAgreementTheFM3AmendmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wdq_OfficeFurnitureAndFixturesAndOfficeEquipmentMember" abstract="true" name="OfficeFurnitureAndFixturesAndOfficeEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_PreferredStockDividendRateQuarterlyIncreaseAfterOneYearIfFailedToRedeem" abstract="false" name="PreferredStockDividendRateQuarterlyIncreaseAfterOneYearIfFailedToRedeem" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_NoncashBusinessCombinationFairValueAdjustmentsOfDerivativeWarrantLiabilities" abstract="false" name="NoncashBusinessCombinationFairValueAdjustmentsOfDerivativeWarrantLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_RelatedPartyTransactionTermOfContract" abstract="false" name="RelatedPartyTransactionTermOfContract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="wdq_PreferredStockDividendRateIfFailedToRedeem" abstract="false" name="PreferredStockDividendRateIfFailedToRedeem" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_Block1OpalEarnoutSharesMember" abstract="true" name="Block1OpalEarnoutSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_FinancingReceivableMaximumRevenueBasedDistributionsEntitledToReceive" abstract="false" name="FinancingReceivableMaximumRevenueBasedDistributionsEntitledToReceive" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_HillmanMember" abstract="true" name="HillmanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_IncreaseDecreaseInPartsInventories" abstract="false" name="IncreaseDecreaseInPartsInventories" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_PermanentLoanMember" abstract="true" name="PermanentLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ContractWithCustomerAssetAfterAllowanceForCreditLossRetainageCurrent" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossRetainageCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ArcLightCleanTransitionCorpIIArclightMember" abstract="true" name="ArcLightCleanTransitionCorpIIArclightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_DerivativeInstrumentContingentConsiderationLiabilitySharesSold" abstract="false" name="DerivativeInstrumentContingentConsiderationLiabilitySharesSold" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wdq_ReverseRecapitalizationNet" abstract="false" name="ReverseRecapitalizationNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_PreferredStockRedemptionPeriodAfterWhichRedeemable" abstract="false" name="PreferredStockRedemptionPeriodAfterWhichRedeemable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="wdq_NumberOfFacilities" abstract="false" name="NumberOfFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_StockIssuedDuringPeriodValueReverseRecapitalization" abstract="false" name="StockIssuedDuringPeriodValueReverseRecapitalization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_EquityMethodInvestmentAdditionalInvestmentToParentRepresentingCapitalizedInterest" abstract="false" name="EquityMethodInvestmentAdditionalInvestmentToParentRepresentingCapitalizedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_FinanceLeaseLiabilityNewLeases" abstract="false" name="FinanceLeaseLiabilityNewLeases" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NumberOfStandbyLettersOfCreditsHeld" abstract="false" name="NumberOfStandbyLettersOfCreditsHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_EquityMethodInvestmentDeconsolidationOfVariableInterestEntity" abstract="false" name="EquityMethodInvestmentDeconsolidationOfVariableInterestEntity" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ContractWithCustomerLiabilityBillingsInExcessOfCostsAndEstimatedEarningsCurrent" abstract="false" name="ContractWithCustomerLiabilityBillingsInExcessOfCostsAndEstimatedEarningsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_InterestExpenseDebtNetOfPrePaymentPenalty" abstract="false" name="InterestExpenseDebtNetOfPrePaymentPenalty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_EnvironmentalCreditsMember" abstract="true" name="EnvironmentalCreditsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_NumberOfPurchaseOptionContracts" abstract="false" name="NumberOfPurchaseOptionContracts" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_NoncashDividendsRedeemablePreferredNonControllingInterestsPaidInKind" abstract="false" name="NoncashDividendsRedeemablePreferredNonControllingInterestsPaidInKind" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_SeriesA1PreferredStockMember" abstract="true" name="SeriesA1PreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_OpalFuelsStockholdersMember" abstract="true" name="OpalFuelsStockholdersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NoncashBusinessCombinationFairValueAdjustmentsOfEarnoutLiabilities" abstract="false" name="NoncashBusinessCombinationFairValueAdjustmentsOfEarnoutLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_ThirdPartyConstructionMember" abstract="true" name="ThirdPartyConstructionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_CostarPartnersLLCCostarMember" abstract="true" name="CostarPartnersLLCCostarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_RedeemablePreferredNoncontrollingInterestMember" abstract="true" name="RedeemablePreferredNoncontrollingInterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ClassDOrdinaryShareMember" abstract="true" name="ClassDOrdinaryShareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_RightOfUseLiabilitiesObtainedInExchangeForFinanceLeaseLiabilityNoncurrent" abstract="false" name="RightOfUseLiabilitiesObtainedInExchangeForFinanceLeaseLiabilityNoncurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_SeniorSecuredCreditFacilityTermLoanMember" abstract="true" name="SeniorSecuredCreditFacilityTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_SiteMember" abstract="true" name="SiteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_AcquisitionOfNoncontrollingInterestContingentConsiderationLiabilityFairValueDisclosure" abstract="false" name="AcquisitionOfNoncontrollingInterestContingentConsiderationLiabilityFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_NaturalGasCompressedMember" abstract="true" name="NaturalGasCompressedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_AccruedFederalFuelTaxCreditsPerGasolineGallon" abstract="false" name="AccruedFederalFuelTaxCreditsPerGasolineGallon" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:monetaryPerVolumeItemType"/>
  <xs:element id="wdq_OpalTermLoanMember" abstract="true" name="OpalTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_FM3Member" abstract="true" name="FM3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_CashAcquiredThroughReverseRecapitalization" abstract="false" name="CashAcquiredThroughReverseRecapitalization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_WarrantAgreementMember" abstract="true" name="WarrantAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_NobleRoadMember" abstract="true" name="NobleRoadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_UnrealizedGainLossOnConvertibleNotesPayable" abstract="false" name="UnrealizedGainLossOnConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_FuelPurchasingAgreementsMember" abstract="true" name="FuelPurchasingAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_NoncontrollingInterestDecreaseFromIssuanceOfRedeemablePreferredNoncontrollingInterests" abstract="false" name="NoncontrollingInterestDecreaseFromIssuanceOfRedeemablePreferredNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantMinimumRequiredLiquidity" abstract="false" name="DebtInstrumentCovenantMinimumRequiredLiquidity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OperatingAgreementsMember" abstract="true" name="OperatingAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfIssuedStockMinimum" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfIssuedStockMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_ProceedsFromNonredeemableNoncontrollingInterestRelatedParty" abstract="false" name="ProceedsFromNonredeemableNoncontrollingInterestRelatedParty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_FortistarLLCFortistarMember" abstract="true" name="FortistarLLCFortistarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_TemporaryEquityIncreaseFromStockBasedCompensation" abstract="false" name="TemporaryEquityIncreaseFromStockBasedCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OpalEarnoutSharesMember" abstract="true" name="OpalEarnoutSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_OpalFuelsMember" abstract="true" name="OpalFuelsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_JointVentureIndependentBoardOfDirectorsNumberOfMembers" abstract="false" name="JointVentureIndependentBoardOfDirectorsNumberOfMembers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wdq_FinancingReceivablePaidInKindInterestIncome" abstract="false" name="FinancingReceivablePaidInKindInterestIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_DebtInstrumentCovenantDebtServiceCoverageRatioMinimum" abstract="false" name="DebtInstrumentCovenantDebtServiceCoverageRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wdq_ReynoldsRNGLLCMember" abstract="true" name="ReynoldsRNGLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wdq_LineOfCreditFacilityCovenantMaximumBorrowingCapacityAnnualReducedAmount" abstract="false" name="LineOfCreditFacilityCovenantMaximumBorrowingCapacityAnnualReducedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wdq_OPALFuelsIntermediateHoldingCompanyLLCOPALIntermediateHoldcoMember" abstract="true" name="OPALFuelsIntermediateHoldingCompanyLLCOPALIntermediateHoldcoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
