Waste Management is a holding company providing waste management environmental services and sustainability solutions. It operates through the Solid Waste business divided into East Tier and West Tier segments as well as Other and Corporate and Other segments. The Solid Waste segments provide integrated environmental services including collecting, transfer, recycling, and disposal of waste and recyclable materials. The Other segment specializes in landfill gas-to-energy operations, third-party subcontract and administration revenues, recycling brokerage services, etc. The Corporate and Other segment delivers support services such as treasury, legal, digital, tax, insurance, centralized service center processes, and other administrative functions.