Waste Management 2006 Annual Report Download - page 157

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Board of Directors and Stockholders of Waste Management, Inc.
We have audited the consolidated financial statements of Waste Management, Inc. (the “Company”) as of
December 31, 2006 and 2005, and for each of the three years in the period ended December 31, 2006, and have
issued our report thereon dated February 14, 2007 (included elsewhere in this Form 10-K). Our audit also included
the financial statement schedule listed in Item 15(a)(2) of this Form 10-K. This schedule is the responsibility of the
Company’s management. Our responsibility is to express an opinion based on our audit.
In our opinion, the financial statement schedule referred to above, when considered in relation to the basic
consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth
therein.
ERNST & YOUNG LLP
Houston, Texas
February 14, 2007
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