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<!-- RR Donnelley Xcelerate Taxonomy Schema, based on XBRL 2.1  http://www.rrdonnelley.com/ -->
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<!-- Creation date: 2014-10-28T19:39:23Z -->
<!-- Copyright (c) 2005-2013 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 - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
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        <link:definition>104 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
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        <link:definition>105 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)</link:definition>
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        <link:definition>106 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)</link:definition>
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        <link:definition>107 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)</link:definition>
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        <link:definition>108 - Statement - CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited)</link:definition>
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        <link:definition>109 - Disclosure - Basis of Presentation</link:definition>
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        <link:definition>110 - Disclosure - Landfill and Environmental Remediation Liabilities</link:definition>
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        <link:definition>111 - Disclosure - Debt</link:definition>
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        <link:definition>112 - Disclosure - Derivative Instruments and Hedging Activities</link:definition>
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        <link:definition>113 - Disclosure - Income Taxes</link:definition>
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        <link:definition>114 - Disclosure - Earnings Per Share</link:definition>
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        <link:definition>115 - Disclosure - Commitments and Contingencies</link:definition>
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        <link:definition>116 - Disclosure - Segment and Related Information</link:definition>
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        <link:definition>117 - Disclosure - Acquisitions, Divestitures and Businesses Held-for-Sale</link:definition>
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        <link:definition>118 - Disclosure - Restructuring</link:definition>
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        <link:definition>119 - Disclosure - Asset Impairments and Unusual Items</link:definition>
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        <link:definition>120 - Disclosure - Accumulated Other Comprehensive Income</link:definition>
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        <link:definition>121 - Disclosure - Share Repurchases</link:definition>
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        <link:definition>122 - Disclosure - Fair Value Measurements</link:definition>
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        <link:definition>123 - Disclosure - Variable Interest Entities</link:definition>
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        <link:definition>124 - Disclosure - Condensed Consolidating Financial Statements</link:definition>
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        <link:definition>125 - Disclosure - New Accounting Standard Pending Adoption</link:definition>
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        <link:definition>126 - Disclosure - Basis of Presentation (Policies)</link:definition>
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        <link:definition>127 - Disclosure - Landfill and Environmental Remediation Liabilities (Tables)</link:definition>
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        <link:definition>128 - Disclosure - Debt (Tables)</link:definition>
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        <link:definition>129 - Disclosure - Derivative Instruments and Hedging Activities (Tables)</link:definition>
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        <link:definition>130 - Disclosure - Earnings Per Share (Tables)</link:definition>
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        <link:definition>131 - 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>132 - Disclosure - Acquisitions, Divestitures and Businesses Held-for-Sale (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables" id="Role_NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables">
        <link:definition>133 - Disclosure - Accumulated Other Comprehensive Income (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsFairValueDisclosuresTextBlockTables" id="Role_NotesToFinancialStatementsFairValueDisclosuresTextBlockTables">
        <link:definition>134 - Disclosure - Fair Value Measurements (Tables)</link:definition>
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        <link:definition>135 - Disclosure - Condensed Consolidating Financial Statements (Tables)</link:definition>
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        <link:definition>136 - Disclosure - Basis of Presentation - Additional Information (Detail)</link:definition>
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        <link:definition>137 - Disclosure - Landfill and Environmental Remediation Liabilities - Liabilities for Landfill and Environmental Remediation Costs (Detail)</link:definition>
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        <link:definition>138 - Disclosure - Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Detail)</link:definition>
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        <link:definition>139 - Disclosure - Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Parenthetical) (Detail)</link:definition>
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        <link:definition>140 - Disclosure - Debt - Components of Debt (Detail)</link:definition>
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        <link:definition>141 - Disclosure - Debt - Components of Debt (Parenthetical) (Detail)</link:definition>
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        <link:definition>142 - Disclosure - Debt - Additional Information (Detail)</link:definition>
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        <link:definition>143 - Disclosure - Derivative Instruments and Hedging Activities - Fair Values of Derivative Instruments Recorded in Balance Sheet (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformation" id="DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformation">
        <link:definition>144 - Disclosure - Derivative Instruments and Hedging Activities - Additional Information (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation" id="DisclosureIncomeTaxesAdditionalInformation">
        <link:definition>145 - Disclosure - Income Taxes - Additional information (Detail)</link:definition>
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        <link:definition>146 - Disclosure - Earnings Per Share - Common Share Data Used for Computing Basic and Diluted Earnings Per Share (Detail)</link:definition>
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        <link:definition>147 - Disclosure - Commitments and Contingencies - Additional information (Detail)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureSegmentAndRelatedInformationAdditionalInformation" id="DisclosureSegmentAndRelatedInformationAdditionalInformation">
        <link:definition>148 - Disclosure - Segment and Related Information - Additional Information (Detail)</link:definition>
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        <link:definition>149 - Disclosure - Segment and Related Information - Reportable Segments (Detail)</link:definition>
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        <link:definition>150 - Disclosure - Segment and Related Information - Reportable Segments (Parenthetical) (Detail)</link:definition>
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  <element name="WasteDiversionTechnologyCompaniesMember" id="wm_WasteDiversionTechnologyCompaniesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteProcessingFacilityMember" id="wm_WasteProcessingFacilityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyLlcMember" id="wm_WasteToEnergyLlcMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyLlcOneMember" id="wm_WasteToEnergyLlcOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyLlcTwoMember" id="wm_WasteToEnergyLlcTwoMember" 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>
