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Question

(a) What is meant by 'environment'?
(b) What type of substances are the major pollutants of the environment? Name two such substances.
(c) Name the organisms whose uncontrolled activities are damaging the environment.
(d) Explain why, it is better to use paper bags than plastic bags.


Solution

(a) Our physical surroundings, which include the air, water bodies, the soil and all living organisms such as plants, animals, human beings and micro-organisms, constitute our environment.

(b) Non-biodegradable substances are the major pollutants of the environment. Two such substances are plastic articles and glass articles.

(c) Human beings are the organisms whose uncontrolled activities are damaging the environment.

(d) It is better to use paper bags than plastic bags because paper bags are biodegradable and can easily be degraded by micro-organisms, whereas plastic bags are non-biodegradable and cannot be degraded by micro-organisms.

Science
Lakhmir Biology 2013
Standard X

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