Waste Management Incorporated. The Group's principal activity is to provide integrated waste services. The Group operates through two segments namely: Solid waste and Non-Solid waste. The services include collection, transfer, recycling and resource and recovery and disposal of hazardous waste. The services are provided to commercial, industrial, municipal and residential customers, waste management companies, governmental entities and independent power market participants. Solid waste accounted for 100% of 2002 revenues and Non-Solid waste, nominal.