Definition:
Waste (also known as rubbish, trash, refuse,
garbage, junk) is any unwanted or useless materials. Waste is any substance
that is discarded after primary use or is worthless, defective, and of no use.
Waste, also referred to as garbage or rubbish, is unwanted material that is discarded.
Types of waste:
a) Chemical waste
b) Biomedical waste
c) Solid waste
d) Liquid waste
e) Gaseous waste
f) Animal by-products
g) Special Waste
Sources of Waste:
a) Domestic waste
b) Commercial waste
c) Agricultural waste
d) Industrial waste
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