Waste Management, Inc. (WM) is a provider of waste management services in North America. WM�s subsidiaries provide collection, transfer, recycling, and disposal services. WM is a developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. Its customers include residential, commercial, industrial and municipal customers throughout North America. Its segments include Eastern, Midwest, Southern, Western and Wheelabrator Groups. The Oakleaf operations are included in other. The services the Company provides include collection, landfill, transfer, waste-to-energy facilities and independent power production plants, recycling and other services. In January 2013, its subsidiary, WM Recycle America, L.L.C., acquired Greenstar, LLC. Effective August 1, 2013, Waste Management Inc acquired Summit Energy Services, and concurrently, WM acquired Liquid Logistics. Effective August 1, 2013, Waste Management Inc acquired Oak Grove Disposal Co.