Which of the following is a biodegradable waste?
(a) Radioactive wastes (b) Aluminium cans
(c) DDT (d) Cattle dung
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Answer:
cattle dung is a biodegradable waste
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(d) Cattle dung
Explanation:
Biodegradable substance is one that can be broken down or decomposed rapidly by the action of microorganisms. Biodegradable substances include food scraps, cotton, wool, wood, human and animal waste, manufactured products based on natural materials such as paper and vegetable-oil based soaps. Biodegradable substances must be used to avoid polluting the environment.
Radioactive wastes, aluminium cans, DDT are not biodegradable. Cow dung is biodegradable.
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