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        <link:linkbaseRef xlink:type="simple" xlink:href="ceti-20260331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
      </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
    <import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd" />
    <import namespace="http://fasb.org/us-types/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-types-2026.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
    <import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2026" schemaLocation="https://xbrl.sec.gov/country/2026/country-2026.xsd" />
    <import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd" />
    <import namespace="http://fasb.org/srt-types/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-types-2026.xsd" />
    <element id="CETI_SeriesAConvertiblePreferredStockMember" name="SeriesAConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SeriesBConvertiblePreferredStockMember" name="SeriesBConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SeriesCNonConvertiblePreferredStockMember" name="SeriesCNonConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SeriesDConvertiblePreferredStockMember" name="SeriesDConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_Special2020SeriesAPreferredStockMember" name="Special2020SeriesAPreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_Special2025SeriesAPreferredStockMember" name="Special2025SeriesAPreferredStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommonStockToBeIssuedMember" name="CommonStockToBeIssuedMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_TreasuryMember" name="TreasuryMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WestTexasResourcesIncMember" name="WestTexasResourcesIncMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DELTAMember" name="DELTAMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockOptionsMember" name="StockOptionsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotePayableMember" name="ConvertibleNotePayableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EmbeddedDerivativesMember" name="EmbeddedDerivativesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConsultingServicesAgreementMember" name="ConsultingServicesAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_FinancialConsultingEngagementAgreementMember" name="FinancialConsultingEngagementAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EquipmentTurkeyMember" name="EquipmentTurkeyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AirPowerUSAMember" name="AirPowerUSAMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotePayableMember" name="NotePayableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotePayableRelatedPartyMember" name="NotePayableRelatedPartyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableRelatedPartyMember" name="ConvertibleNotesPayableRelatedPartyMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LoanPayableMember" name="LoanPayableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_FourLoanPayableMember" name="FourLoanPayableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_KimDSouthworthMember" name="KimDSouthworthMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_FortyFiveConvertibleNotesPayableMember" name="FortyFiveConvertibleNotesPayableMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SevenLoansMember" name="SevenLoansMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ExecutedThreeConvertibleNotesMember" name="ExecutedThreeConvertibleNotesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_IndexedSharesMember" name="IndexedSharesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_FairValuesMember" name="FairValuesMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_KimNSouthworthMember" name="KimNSouthworthMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SeriesDConvertibleStockMember" name="SeriesDConvertibleStockMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockPriceGuaranteeArrangementMember" name="StockPriceGuaranteeArrangementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EquityPurtchaseAgreementMember" name="EquityPurtchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsMember" name="WarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockWarrantMember" name="StockWarrantMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommercialLendersMember" name="CommercialLendersMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SaleOfFutureReceiptsAgreementMember" name="SaleOfFutureReceiptsAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DanLeboffeMember" name="DanLeboffeMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_BrookBrostMember" name="BrookBrostMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DonaldGrittenMember" name="DonaldGrittenMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_InvestmentInWtxr" name="InvestmentInWtxr" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LongtermDeposits" name="LongtermDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AccountsPayableRelatedParties" name="AccountsPayableRelatedParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotePayableRelatedPartyCurrent" name="NotePayableRelatedPartyCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableRelatedParties" name="ConvertibleNotesPayableRelatedParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ContingentLiability" name="ContingentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommonStockToBeIssued" name="CommonStockToBeIssued" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConsultingExpense" name="ConsultingExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ChangeInFairValueOfDerivatives" name="ChangeInFairValueOfDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_GainOnExtinguishmentOfDerivativeLiability" name="GainOnExtinguishmentOfDerivativeLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ChangeInFairValueOfContingentLiability" name="ChangeInFairValueOfContingentLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NetLossBeforeIncomeTaxes" name="NetLossBeforeIncomeTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NetIncomeLossAvailableToCommonStockholders" name="NetIncomeLossAvailableToCommonStockholders" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockIssuedDuringPeriodValueCash" name="StockIssuedDuringPeriodValueCash" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForCashShares" name="SharesIssuedForCashShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ShareIssuedPursuantToManufacturingAndDistributionAgreement" name="ShareIssuedPursuantToManufacturingAndDistributionAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ShareIssuedPursuantToManufacturingAndDistributionAgreementShares" name="ShareIssuedPursuantToManufacturingAndDistributionAgreementShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommonSharesExchangeForPreferredValue" name="CommonSharesExchangeForPreferredValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommonSharesExchangeForPreferredSharesShares" name="CommonSharesExchangeForPreferredSharesShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedToCoverStockPriceGuarantee" name="SharesIssuedToCoverStockPriceGuarantee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedToCoverStockPriceGuaranteeShares" name="SharesIssuedToCoverStockPriceGuaranteeShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockIssuedDuringPeriodValueSharesIssuedForInterest" name="StockIssuedDuringPeriodValueSharesIssuedForInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForInterestShares" name="SharesIssuedForInterestShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForConversionOfConvertibleNotesPayable" name="SharesIssuedForConversionOfConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForConversionOfConvertibleNotesPayableShares" name="SharesIssuedForConversionOfConvertibleNotesPayableShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ChangesInFairValueOfContingentLiability" name="ChangesInFairValueOfContingentLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_GainOnExtinguishmentOfDerivativesLiability" name="GainOnExtinguishmentOfDerivativesLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ProceedsFromSharesIssuedForCash" name="ProceedsFromSharesIssuedForCash" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForDepositOnDistributionAndManufacturingAgreement" name="SharesIssuedForDepositOnDistributionAndManufacturingAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesIssuedForStockPriceGuarantee" name="SharesIssuedForStockPriceGuarantee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtDiscount" name="DebtDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PreferredToCommonStockExchange" name="PreferredToCommonStockExchange" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisclosureLongTermDepositAbstract" name="DisclosureLongTermDepositAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LongTermDepositTextBlock" name="LongTermDepositTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisclosureStockholdersDeficitAbstract" name="DisclosureStockholdersDeficitAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockOptionsAndWarrantsDisclosureTextBlock" name="StockOptionsAndWarrantsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LoanReceivablePolicyTextBlock" name="LoanReceivablePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ScheduleOfDerivativesAssumptionsUsedTableTextBlock" name="ScheduleOfDerivativesAssumptionsUsedTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ScheduleOfChangesInFairValueInputsAndAssumptionsTableTextBlock" name="ScheduleOfChangesInFairValueInputsAndAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AgreementRaisedMoney" name="AgreementRaisedMoney" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ManufacturingAndDistributionAgreementTerm" name="ManufacturingAndDistributionAgreementTerm" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RelatedPartyIssuedLoanAmount" name="RelatedPartyIssuedLoanAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LoanPercentagePerYear" name="LoanPercentagePerYear" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockSharePaidPerValue" name="StockSharePaidPerValue" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AdditionalInterestPaidInCash" name="AdditionalInterestPaidInCash" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_InterestPayableCurrentPerDay" name="InterestPayableCurrentPerDay" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RevolvingLineOfCreditDescription" name="RevolvingLineOfCreditDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtInstrumenttotalOfInterest" name="DebtInstrumenttotalOfInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotesPayableDescriptions" name="NotesPayableDescriptions" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotePayableRelatedParty" name="ConvertibleNotePayableRelatedParty" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableDescription" name="ConvertibleNotesPayableDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableGross" name="ConvertibleNotesPayableGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleLongTermNotePayable" name="ConvertibleLongTermNotePayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotePayableCurrent" name="ConvertibleNotePayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LongtermConvertibleNotesPayable" name="LongtermConvertibleNotesPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayables" name="ConvertibleNotesPayables" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantDerivatives" name="WarrantDerivatives" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EmbeddedDerivativeGainOnEmbeddedDerivatives" name="EmbeddedDerivativeGainOnEmbeddedDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EmbeddedDerivativeLossOnIssuanceOfWarrants" name="EmbeddedDerivativeLossOnIssuanceOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskAdjustedInterestRate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskAdjustedInterestRate" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_IssuancesAbstract" name="IssuancesAbstract" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_IssuanceOfEmbeddedDerivatives" name="IssuanceOfEmbeddedDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsDerivatives" name="WarrantsDerivatives" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ChangesInFairValueInputsAndAssumptionsReflectedInIncome" name="ChangesInFairValueInputsAndAssumptionsReflectedInIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConvertibleNotesPayableRelatedParty" name="ConvertibleNotesPayableRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EquityMethodInvestmentsOwnershipPercentage" name="EquityMethodInvestmentsOwnershipPercentage" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NotePayableRelatedParty" name="NotePayableRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ConsultingService" name="ConsultingService" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PreferredStockSharesDesignated" name="PreferredStockSharesDesignated" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NumberOfSharesCancelled" name="NumberOfSharesCancelled" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommonStockSharesIssuedOther" name="CommonStockSharesIssuedOther" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_PreferredStockSharesIssuedOther" name="PreferredStockSharesIssuedOther" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_QuotedMarketPrice" name="QuotedMarketPrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_EffectiveContractualStrikePrice" name="EffectiveContractualStrikePrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_MarketVolatility" name="MarketVolatility" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RiskadjustedInterestRate" name="RiskadjustedInterestRate" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WeightedAverageRemainingContractualLifeIssued" name="WeightedAverageRemainingContractualLifeIssued" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_NumberOfSharesWarrantsIssuedUnderFullRatchetProtection" name="NumberOfSharesWarrantsIssuedUnderFullRatchetProtection" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WeightedAverageExercisePriceIssuedUnderFullRatchetProtection" name="WeightedAverageExercisePriceIssuedUnderFullRatchetProtection" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WeightedAverageRemainingContractualLifeWarrantsIssued" name="WeightedAverageRemainingContractualLifeWarrantsIssued" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_CommitmentsAndContingenciesAxis" name="CommitmentsAndContingenciesAxis" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" />
    <element id="CETI_CommitmentsAndContingenciesDomain" name="CommitmentsAndContingenciesDomain" abstract="true" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_SharesPaid" name="SharesPaid" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsReceived" name="WarrantsReceived" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_WarrantsIssued" name="WarrantsIssued" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockholdersEquityNoteWarrantsAndRightsOutstandingArrangementShareIssuanceShares" name="StockholdersEquityNoteWarrantsAndRightsOutstandingArrangementShareIssuanceShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ProceedsFromStockOptionsAndWarrantsExercised" name="ProceedsFromStockOptionsAndWarrantsExercised" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockPurchaseAgreementMaximumPurchasableAmount" name="StockPurchaseAgreementMaximumPurchasableAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_StockPurchaseAgreementCommitmentShares" name="StockPurchaseAgreementCommitmentShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DisposalGroupIncludingDiscontinuedOperationCostOfGoodsSold" name="DisposalGroupIncludingDiscontinuedOperationCostOfGoodsSold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DiscontinuedOperationProvisionsForLossGainOnDisposalBeforeIncomeTax" name="DiscontinuedOperationProvisionsForLossGainOnDisposalBeforeIncomeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ImpairmentProvedProperties" name="ImpairmentProvedProperties" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_RailroadCommissionBondOfTexas" name="RailroadCommissionBondOfTexas" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_AdditionalContingentLiability" name="AdditionalContingentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_LessValuationAllowance" name="LessValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_DebtIssuanceCostsIncurredDuringPeriod" name="DebtIssuanceCostsIncurredDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="CETI_ProceedsFromIssuanceOfDebtNet" name="ProceedsFromIssuanceOfDebtNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
</schema>
