Waste means any substance of chemical, biological, or nuclear origin. Waste is generated solely by human activity. It is not suitable for further use in the conventional manner and it requires new methods of treatment and processing. It can be divided into gaseous, liquid and solid waste. Waste can be inert, non-hazardous, and hazardous.
Waste management means collection, transport, recovery and disposal of waste, including the supervision of such operations and the after-care of disposal sites, and includes actions taken by dealers or brokers.