Waste Management is the generation, prevention, characterization, monitoring, treatment, handling, reuse and ultimate residual disposition of solid wastes, both in industrialized and in economically developing countries. Waste management encompasses management of all processes and resources for proper handling of waste materials, from maintenance of waste transport trucks and dumping facilities to compliance with health codes and environmental regulations. The concept of waste management involves the collection, removal, processing, and disposal of materials considered waste. Waste materials can be solid, gaseous, liquid, or even hazardous and are generally generated through human activity. Historically, developed nations have dealt with their waste by sending it to landfills or burning it in incinerators. Both of these options come with some significant environmental problems. Waste management officers organize and manage waste disposal, collection and recycling facilities. They may be responsible for waste treatment and street cleaning operations.