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<!-- Round: 9a56329a-c97e-43e3-9806-5fb4ddfa13c7 -->
<!-- Creation date: 2012-10-30T00:04:07Z -->
<!-- Copyright (c) 2005-2012 R.R. Donnelley & Sons Company All Rights Reserved. -->
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        <link:definition>101 - Document - Document and Entity Information</link:definition>
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        <link:definition>103 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
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        <link:definition>104 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
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        <link:definition>105 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
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        <link:definition>106 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
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        <link:definition>107 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</link:definition>
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        <link:definition>108 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
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        <link:definition>109 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY</link:definition>
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        <link:definition>110 - Disclosure - Basis of Presentation</link:definition>
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        <link:definition>111 - Disclosure - Landfill and Environmental Remediation Liabilities</link:definition>
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        <link:definition>112 - Disclosure - Debt</link:definition>
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        <link:definition>113 - Disclosure - Derivative Instruments and Hedging Activities</link:definition>
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        <link:definition>114 - Disclosure - Income Taxes</link:definition>
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        <link:definition>115 - Disclosure - Earnings Per Share</link:definition>
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        <link:definition>116 - Disclosure - Commitments and Contingencies</link:definition>
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        <link:definition>117 - Disclosure - Segment and Related Information</link:definition>
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        <link:definition>118 - Disclosure - Acquisitions</link:definition>
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        <link:definition>119 - Disclosure - Restructuring</link:definition>
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        <link:definition>120 - Disclosure - Asset Impairments and Unusual Items</link:definition>
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        <link:definition>121 - Disclosure - Fair Value Measurements</link:definition>
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        <link:definition>122 - Disclosure - Variable Interest Entities</link:definition>
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        <link:definition>123 - Disclosure - Condensed Consolidating Financial Statements</link:definition>
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        <link:definition>124 - Disclosure - Basis of Presentation (Policies)</link:definition>
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        <link:definition>125 - Disclosure - Landfill and Environmental Remediation Liabilities (Tables)</link:definition>
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        <link:definition>126 - Disclosure - Debt (Tables)</link:definition>
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        <link:definition>127 - Disclosure - Derivative Instruments and Hedging Activities (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlockTables" id="Role_NotesToFinancialStatementsEarningsPerShareTextBlockTables">
        <link:definition>128 - Disclosure - Earnings Per Share (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables">
        <link:definition>129 - Disclosure - Segment and Related Information (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables">
        <link:definition>130 - Disclosure - Acquisitions (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables">
        <link:definition>131 - Disclosure - Restructuring (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsFairValueDisclosuresTextBlockTables" id="Role_NotesToFinancialStatementsFairValueDisclosuresTextBlockTables">
        <link:definition>132 - Disclosure - Fair Value Measurements (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialStatementsTextBlockTables" id="Role_NotesToFinancialStatementsCondensedFinancialStatementsTextBlockTables">
        <link:definition>133 - Disclosure - Condensed Consolidating Financial Statements (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureBasisOfPresentationAdditionalInformation" id="DisclosureBasisOfPresentationAdditionalInformation">
        <link:definition>134 - Disclosure - Basis of Presentation - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureLiabilitiesForLandfillAndEnvironmentalRemediationCosts" id="DisclosureLiabilitiesForLandfillAndEnvironmentalRemediationCosts">
        <link:definition>135 - Disclosure - Liabilities for Landfill and Environmental Remediation Costs (Detail)</link:definition>
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        <link:definition>136 - Disclosure - Changes to Landfill and Environmental Remediation Liabilities (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>137 - Disclosure - Components of Debt (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtAdditionalInformation" id="DisclosureDebtAdditionalInformation">
        <link:definition>138 - Disclosure - Debt - Additional Information (Detail)</link:definition>
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        <link:definition>139 - Disclosure - Fair values of Derivative Instruments Recorded in Balance Sheet (Detail)</link:definition>
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        <link:definition>140 - Disclosure - Derivative Instruments and Hedging Activities - Additional Information (Detail)</link:definition>
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        <link:definition>141 - Disclosure - Impact of Changes in Fair Value of Interest Rate Swaps and Underlying Hedged Items on Results of Operations (Detail)</link:definition>
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        <link:definition>142 - Disclosure - Impact of Periodic Settlements of Active Swap Agreements and Impact of Terminated Swap Agreements on Results of Operations (Detail)</link:definition>
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        <link:definition>143 - Disclosure - Pre-tax Impacts of Foreign Currency Cash Flow Derivatives on Comprehensive Income and Results of Operations (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation" id="DisclosureIncomeTaxesAdditionalInformation">
        <link:definition>144 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureCommonShareDataUsedForComputingBasicAndDilutedEarningsPerShare" id="DisclosureCommonShareDataUsedForComputingBasicAndDilutedEarningsPerShare">
        <link:definition>145 - Disclosure - Common Share Data Used for Computing Basic and Diluted Earnings Per Share (Detail)</link:definition>
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        <link:definition>146 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureSegmentAndRelatedInformationAdditionalInformation" id="DisclosureSegmentAndRelatedInformationAdditionalInformation">
        <link:definition>147 - Disclosure - Segment and Related Information - Additional Information (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureReportableSegments" id="DisclosureReportableSegments">
        <link:definition>148 - Disclosure - Reportable Segments (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureAcquisitionsAdditionalInformation" id="DisclosureAcquisitionsAdditionalInformation">
        <link:definition>149 - Disclosure - Acquisitions - Additional Information (Detail)</link:definition>
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        <link:definition>150 - Disclosure - Adjustments to Preliminary Purchase Price Allocation (Detail)</link:definition>
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        <link:definition>151 - Disclosure - Preliminary Allocation Purchase Price Intangible Assets (Detail)</link:definition>
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        <link:definition>152 - Disclosure - Pro Forma Consolidated Results of Operations (Detail)</link:definition>
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  <element name="VariableInterestEntityNonControllingInterestInConsolidatedNetIncome" id="wm_VariableInterestEntityNonControllingInterestInConsolidatedNetIncome" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityReportingEntityPercentageOfInterestInEarningsAfterAchievingTargetedReturns" id="wm_VariableInterestEntityReportingEntityPercentageOfInterestInEarningsAfterAchievingTargetedReturns" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityThirdPartiesPercentageOfInterestInEarningsAfterAchievingTargetedReturns" id="wm_VariableInterestEntityThirdPartiesPercentageOfInterestInEarningsAfterAchievingTargetedReturns" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityThirdPartyInitialInvestment" id="wm_VariableInterestEntityThirdPartyInitialInvestment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityThirdPartyOwnershipPercentage" id="wm_VariableInterestEntityThirdPartyOwnershipPercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VendorRelationshipsMember" id="wm_VendorRelationshipsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WesternMember" id="wm_WesternMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WheelabratorMember" id="wm_WheelabratorMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>
</XBRL>
