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18/10/2021 9:13 pm
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(a) What is meant by non-biodegradable waste materials? Give two examples of non-biodegradable wastes.
(b) Which of the following materials are biodegradable?
Animal bones, Iron nails, Plastic mugs, Leather belts, Silver foil
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18/10/2021 9:14 pm
(a) The waste materials which cannot be broken down into non-poisonous or harmless substances in nature are called non-biodegradable waste materials.
Example: D.D.T and Plastics.
(b) Animal Bones and Leather Belts.