HOUSTON--(BUSINESS WIRE)--March 28, 2008--Waste Management, Inc. (NYSE:WMI) announced that it has scheduled an analyst conference call on Tuesday, April 29, 2008 from 9:00 - 10:00 a.m. Central Time (10:00-11:00 a.m. ET) to discuss first quarter 2008 financial results. These results are expected to be released before the opening of the market on Tuesday, April 29, 2008 and will be available on Waste Management's website, http://www.wm.com, after release to the wire services.

Waste Management invites you to listen to the analyst conference call, which is open to the public and will be broadcast live over the Internet, at http://www.wm.com. Company spokespersons will include David Steiner, Chief Executive Officer, Larry O'Donnell, President and Chief Operating Officer, Robert G. Simpson, Senior Vice President and Chief Financial Officer, and Greg Nikkel, Director - Investor Relations.

You may also listen to the analyst conference call by telephone by contacting the conference call operator 5-10 minutes prior to the scheduled start time and asking for the "Waste Management Conference Call - Call ID 39562966." US/Canada Dial-In #: (877) 710-6139. Int'l/Local Dial-In #: (706) 643-7398.

Certain statements and answers to questions during the conference call may contain "forward-looking statements." These statements, and all phases of the Company's operations, are subject to risks and uncertainties, any one of which could cause actual results to differ materially from those described in the forward-looking statements. Investors are reminded that these forward-looking statements must be considered in conjunction with the cautionary warnings and risk factors, which are detailed in Waste Management's most recent Annual Report on Form 10-K filed with the SEC and available from the Company.

What: Waste Management first quarter 2008 earnings release conference call

When: Tuesday, April 29, 2008, from 9:00-10:00 a.m. CT (10:00-11:00 a.m. ET)

Where: http://www.wm.com

How: Live over the Internet, logging on to the address above and selecting "Earnings Webcast" under the Business News section. You can also listen to the conference call by telephone at the number above. Participation will be in listen-only mode.

Requirements: To listen to the call over the Internet, you will need a computer with a sound card, speakers or headphones, and at least a 28.8 Kbps connection to the Internet. If you do not have the Real Player plug-in for your browser, please download it from http://www.real.com/products/player/

Replay: For those unable to listen to the live call, a replay will be available 24 hours a day beginning at approximately noon CT April 29th through 5:00 p.m. CT on May 13th. To hear a replay of the call over the Internet, access the Waste Management Website at http://www.wm.com. To hear a telephonic replay of the call, dial 800-642-1687 or 706-645-9291 and enter conference code 39562966.

Waste Management, Inc. also announced today that Company executives currently plan to present at the following investment conferences during the second quarter of 2008:
   June 4    JP Morgan Basics & Industrials Conference
   June 5    Credit Suisse Environmental & Engineering Services Conference

Although these presentations are not expected to include any material non-public information, the Company will post the presentation slides on its website. The slides will be posted some time during the 24-hour period prior to the scheduled presentation time. The slides may be accessed via the Investor Relations section of the Company's corporate website, which is located at www.wm.com. We anticipate that all of these conferences will be web cast and we will post audio links on our website as they are made available to us.

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.
CONTACT: Waste Management, Inc., Houston
             Analysts: Greg Nikkel, 713-265-1358
             or
             Media: Lynn Brown, 713-394-5093
             http://www.WM.com

SOURCE: Waste Management, Inc.