Question

Differentiate between biodegradable and non-biodegradable substances with the help of one example each.

Answer 1

	Biodegradable wastes		Non-biodegradable wastes
(a)	Waste materials which can be broken down to non-poisonous substances in nature in due course of time by the action of microorganisms such as certain bacteria are called biodegradable wastes.	(a)	Waste materials which cannot be broken down into non-poisonous or harmless substances in nature are called non-biodegradable wastes.
(b)	Examples: Cattle dung, wool, paper, compost	(b)	Examples: Plastics, polythene bags, metal articles, glass objects