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        <FundraisingAmt>2378</FundraisingAmt>
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      <PensionPlanContributionsGrp>
        <TotalAmt>14184</TotalAmt>
        <ProgramServicesAmt>13335</ProgramServicesAmt>
        <ManagementAndGeneralAmt>764</ManagementAndGeneralAmt>
        <FundraisingAmt>85</FundraisingAmt>
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      <OtherEmployeeBenefitsGrp>
        <TotalAmt>19824</TotalAmt>
        <ProgramServicesAmt>6573</ProgramServicesAmt>
        <ManagementAndGeneralAmt>13251</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>40874</TotalAmt>
        <ProgramServicesAmt>38427</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2202</ManagementAndGeneralAmt>
        <FundraisingAmt>245</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>858</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>858</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>2723</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2723</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>60243</TotalAmt>
        <ProgramServicesAmt>51245</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8998</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <OfficeExpensesGrp>
        <TotalAmt>9709</TotalAmt>
        <ProgramServicesAmt>1026</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8683</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>4555</TotalAmt>
        <ProgramServicesAmt>3117</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1387</ManagementAndGeneralAmt>
        <FundraisingAmt>51</FundraisingAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>64804</TotalAmt>
        <ProgramServicesAmt>47548</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17256</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>33669</TotalAmt>
        <ProgramServicesAmt>16010</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17595</ManagementAndGeneralAmt>
        <FundraisingAmt>64</FundraisingAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>42307</TotalAmt>
        <ProgramServicesAmt>39627</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2680</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </ConferencesMeetingsGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>94</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>94</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>2468</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2468</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Equipment rental</Desc>
        <TotalAmt>8960</TotalAmt>
        <ProgramServicesAmt>4375</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4585</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Payroll service fees</Desc>
        <TotalAmt>2463</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2463</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Printing &amp; reproduction</Desc>
        <TotalAmt>4139</TotalAmt>
        <ProgramServicesAmt>2577</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1028</ManagementAndGeneralAmt>
        <FundraisingAmt>534</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Postage &amp; delivery</Desc>
        <TotalAmt>1297</TotalAmt>
        <ProgramServicesAmt>735</ProgramServicesAmt>
        <ManagementAndGeneralAmt>562</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>70621</TotalAmt>
        <ProgramServicesAmt>69525</ProgramServicesAmt>
        <ManagementAndGeneralAmt>996</ManagementAndGeneralAmt>
        <FundraisingAmt>100</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>986148</TotalAmt>
        <ProgramServicesAmt>861018</ProgramServicesAmt>
        <ManagementAndGeneralAmt>120505</ManagementAndGeneralAmt>
        <FundraisingAmt>4625</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>310892</BOYAmt>
        <EOYAmt>416380</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </PledgesAndGrantsReceivableGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>36626</BOYAmt>
        <EOYAmt>5545</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>23700</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>23700</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>94</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>4855</BOYAmt>
        <EOYAmt>1105</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>352467</BOYAmt>
        <EOYAmt>423030</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>35856</BOYAmt>
        <EOYAmt>78594</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>35856</BOYAmt>
        <EOYAmt>78594</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>316611</BOYAmt>
        <EOYAmt>344436</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>316611</BOYAmt>
        <EOYAmt>344436</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>352467</BOYAmt>
        <EOYAmt>423030</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>27825</ReconcilationRevenueExpnssAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>false</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA-01" softwareId="22015534">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <OtherSupportSumAmt>0</OtherSupportSumAmt>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>800019</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>957906</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>897211</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>910131</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>983400</CurrentTaxYearAmt>
        <TotalAmt>4548667</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TaxRevLeviedOrgnztnlBnft170Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft170Grp>
      <GovtFurnSrvcFcltsVl170Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>800019</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>957906</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>897211</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>910131</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>983400</CurrentTaxYearAmt>
        <TotalAmt>4548667</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>970495</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>3578172</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>39</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>45</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>29</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>36</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>22</CurrentTaxYearAmt>
        <TotalAmt>171</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp>
        <TotalAmt>0</TotalAmt>
      </UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>25764</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>51847</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19687</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>28684</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>30551</CurrentTaxYearAmt>
        <TotalAmt>156533</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>4705371</TotalSupportAmt>
      <PublicSupportCY170Pct>0.76040</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.48320</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
      <PublicSupportTotal509Amt>0</PublicSupportTotal509Amt>
      <PublicSupportCY509Pct>0</PublicSupportCY509Pct>
      <InvestmentIncomeCYPct>0</InvestmentIncomeCYPct>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Pt II Ln 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Income Part II, Line 10 Description: Program fees 2018: 25764. 2019: 51847. 2020: 19687. 2021: 28684. 2022: 30551.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB-01">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="IRS990ScheduleD-01" softwareId="22015534">
      <LandGrp>
        <InvestmentCostOrOtherBasisAmt>0</InvestmentCostOrOtherBasisAmt>
        <BookValueAmt>0</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <InvestmentCostOrOtherBasisAmt>0</InvestmentCostOrOtherBasisAmt>
        <BookValueAmt>0</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <InvestmentCostOrOtherBasisAmt>0</InvestmentCostOrOtherBasisAmt>
        <BookValueAmt>0</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <InvestmentCostOrOtherBasisAmt>23700</InvestmentCostOrOtherBasisAmt>
        <DepreciationAmt>23700</DepreciationAmt>
        <BookValueAmt>0</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>0</TotalBookValueLandBuildingsAmt>
      <OtherAssetsOrgGrp>
        <Desc>Rent deposit</Desc>
        <BookValueAmt>1105</BookValueAmt>
      </OtherAssetsOrgGrp>
      <OtherAssetsOrgGrp>
        <Desc>Event deposit</Desc>
        <BookValueAmt>0</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>1105</TotalBookValueOtherAssetsAmt>
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    <IRS990ScheduleI documentId="IRS990ScheduleI-01" softwareId="22015534">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Environmental Law Institute</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1730 M St NW Ste 701</AddressLine1Txt>
          <CityNm>Washington</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20036</ZIPCd>
        </USAddress>
        <RecipientEIN>520901863</RecipientEIN>
        <IRCSectionDesc>501c3</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <PurposeOfGrantTxt>Subgrant</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <TotalOtherOrgCnt>1</TotalOtherOrgCnt>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="IRS990ScheduleJ-01">
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>false</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>false</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>false</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>false</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>false</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>false</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Nsedu Obot Witherspoon MPH</PersonNm>
        <BaseCompensationFilingOrgAmt>154300</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>7715</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>22394</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>184409</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="22015534">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 is prepared by the organizations accountant and submitted to the Executive Director and Board for review and approval.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board is required to disclose any potential conflicts of interest on an annual basis; if an item is presented to the Board for a vote on which a member has a potential conflict of interest, that member must abstain from voting on the proposed item.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization reviews and approves annual compensation of its Executive Director during its annual budget process. Total compensation is evaluated in comparison to other organizations Executive Director positions with related requirements for education and experience.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The organizations governing documents and financial statements are available upon request to be received in person or by mail. The organizations form 990 is also available on its website www.cehn.org and guidestar.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt XI</FormAndLineReferenceDesc>
        <ExplanationTxt>Net audit adjustments to 6/30/18.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d</FormAndLineReferenceDesc>
        <ExplanationTxt>Other program related activities including public outreach 53831. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
