Waste Management, Inc. provides waste management environmental services. The company, through its subsidiaries, provides collection, transfer, recycling and resource recovery, and disposal services. It is also a developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. It operates through three segments: Tier 1. Tier 2 and Tier 3. The Tier 1 segment comprises exclusively of areas in the Southern United States. The Tier 2 segment comprises predominately of areas located in the Midwest and Northeast United States. The Tier 3 segment comprises all remaining areas, including the Northwest and Mid-Atlantic regions of the United States and Eastern Canada. The company was founded on September 30, 1987 and is headquartered in Houston, TX.