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Waste Management May Take BMW Waste-Based Alternative Energy Initiative National

Owner and Operator of Four Landfills in South Carolina to Generate Renewable Electricity Using Landfill Gas

COLUMBIA, S.C., Sept. 24 /PRNewswire-FirstCall/ -- Waste Management, Inc. (NYSE: WMI) today announced a major national initiative to expand its roster of landfill gas to energy (LFGTE) facilities. The program will result in the creation of an additional 60 renewable energy facilities across the country -- including the potential of two additional facilities in South Carolina -- over the next five years.

Waste Management currently operates LFTGE facilities at Elgin and Wellford. The two LFGTE plants generate nearly 16 MW of electricity -- enough to power 15,000 homes per year. The company is also two other landfills in St. George and Ridgeland, which could host a LFGTE facility. As part of the national initiative, WM will generate more than 700 megawatts of clean renewable energy -- enough to power 700,000 homes or replace over eight million barrels of oil per year.

Speaking at the City of Columbia's Environmental Conference, Paul Pabor, vice president of renewable energy stated, "This national initiative is a major step in Waste Management's ongoing efforts to implement sustainable business practices across the company. We're building on the success of our existing local facilities, using the experience we've gathered from over 20 years of developing landfill gas to energy projects to carry out the national 5 year program."

"We're proud to be a part of Waste Management's national renewable energy program. Our work with landfill gas to energy is a central part of our efforts to help make our landfills sites in South Carolina sustainable facilities" said Randall Essick, Senior Business Development Manager for Waste Management of South Carolina. "By providing 16 MW of clean, renewable energy, and possibly more with additional facilities at our St. George and Ridgeland landfills, we're helping to make the region that much more energy independent."

A pioneer in LFGTE projects, Waste Management designed and operated its first such facility in the United States over 20 years ago. With 281 landfills, Waste Management is the country's largest landfill operator and is in a unique position to expand waste-based renewable power generation across the country.

In recent years, consumer awareness of environmental issues and ambitious state Renewable Portfolio Standards have quickly increased demand for new sources of renewable energy. LFGTE projects are especially valuable to utilities because they provide dependable base load power, in contrast to the intermittent nature of other renewable energy sources.

Landfill gas, produced when microorganisms break down organic material in the landfill, is comprised of approximately 50-60 percent methane and 40-50 percent carbon dioxide. At most landfills in the United States, these greenhouse gases are simply burned off, or "flared." However, Waste Management sites with LFGTE facilities collect the methane and use it to fuel onsite engines or turbines, generating electricity to power
surrounding homes and neighborhoods while creating a new revenue stream for the landfills. By building LFGTE facilities, Waste Management reduces greenhouse gases by offsetting the use of fossil fuel at the utility power plants.

About Waste Management
Waste Management, based in Houston, Texas, is the leading provider of comprehensive waste management services in North America. Our subsidiaries provide collection, transfer, recycling and resource recovery, and disposal services. We are also a leading developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. Our customers include residential, commercial, industrial, and municipal customers throughout North America. More information about how Waste Management Thinks Green(R) can be found at http://www.wm.com/wm/thinkgreen.

The Company, from time to time, provides estimates of financial and other data, comments on expectations relating to future periods and makes statements of opinion, view or belief about current and future events.
Statements relating to future events and performance are "forward-looking statements." The forward-looking statements that the Company makes are theCompany's expectations, opinion, view or belief at the point in time of issuance but may change at some future point in time. By issuing estimates or making statements based on current expectations, opinions, views or beliefs, the Company has no obligation, and is not undertaking any obligation, to update such estimates or statements or to provide any other information relating to such estimates or statements. Outlined below are some of the risks that the Company faces and that could affect our financial statements for 2007 and beyond and that could cause actual results to be materially different from those that may be set forth in forward-looking statements made by the Company. However, they are not the only risks that the Company faces. There may be additional risks that we do not presently know or that we currently believe are immaterial which could also impair our business. We caution you not to place undue reliance on any forward-looking statements, which speak only as of their dates. The
following are some of the risks that we face:

-- competition may negatively affect our profitability or cash flows,
our price increases may have negative effects on volumes and price
roll-backs and lower than average pricing to retain and attract
customers may negatively affect our yield on base business;
-- we may be unable to maintain or expand margins if we are unable to
control costs;
-- we may not be able to successfully execute or continue our
operational or other margin improvement plans and programs,
including pricing increases; passing on increased costs to our
customers; reducing costs due to our operational improvement
programs; and divesting under-performing assets and purchasing
accretive businesses, any of which could negatively affect our
revenues and margins;
-- weather conditions cause our quarter-to-quarter results to
fluctuate, and extremely harsh weather or natural disasters may
cause us to temporarily shut down operations;
-- inflation and resulting higher interest rates as well as other
general and local economic conditions may negatively affect the
volumes of waste generated, our financing costs and other expenses;
-- possible changes in our estimates of site remediation requirements,
final capping, closure and post-closure obligations, compliance and
regulatory developments may increase our expenses;
-- regulations, including regulations to limit greenhouse gas
emissions, may negatively impact our business by, among other
things, restricting our operations, increasing costs of operations
or requiring additional capital expenditures;
-- if we are unable to obtain and maintain permits needed to open,
operate, and/or expand our facilities, our results of operations
will be negatively impacted;
-- limitations or bans on disposal or transportation of out-of-state
or cross-border waste or certain categories of waste can increase
our expenses and reduce our revenues;
-- fuel price increases or fuel supply shortages may increase our
expenses, including our tax expense if Section 45K credits are
phased out due to continued high crude oil prices, or restrict our
ability to operate;
-- increased costs to obtain financial assurance or the inadequacy of
our insurance coverages could negatively impact our liquidity and
increase our liabilities;
-- possible charges as a result of shut-down operations, uncompleted
development or expansion projects or other events may negatively
affect earnings;
-- fluctuating commodity prices may have negative effects on our
operating revenues and expenses;
-- trends requiring recycling, waste reduction at the source and
prohibiting the disposal of certain types of wastes could have
negative effects on volumes of waste going to landfills and waste-
to-energy facilities;
-- efforts by labor unions to organize our employees may increase
operating expenses and we may be unable to negotiate acceptable
collective bargaining agreements with those who have been chosen to
be represented by unions, which could lead to union-initiated work
stoppages, including strikes, which could adversely affect our
results of operations and cash flows;
-- negative outcomes of litigation or threatened litigation or
governmental proceedings may increase our costs, limit our ability
to conduct or expand our operations, or limit our ability to
execute our business plans and strategies; problems with the
operation of our current information technology or the development
and deployment of new information systems may decrease our
efficiencies and increase our costs to operate;
-- the adoption of new accounting standards or interpretations may
cause fluctuations in reported quarterly results of operations or
adversely impact our reported results of operations; and
-- we may reduce or eliminate our dividend or share repurchase program
or we may need to raise additional capital if cash flows are less
than we expect or capital expenditures are more than we expect, and
we may not be able to obtain any needed capital on acceptable
terms.
Additional information regarding these and/or other factors that could
materially affect results and the accuracy of the forward-looking
statements contained herein may be found in Part I, Item 1 of the Company's
Annual Report on Form 10-K for the year ended December 31, 2006.

SOURCE Waste Management, Inc.