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Biology
5. Our Environment
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Q45 of 163 Page 227

Explain why, it is better to use paper bags than plastic bags.

It’s better to use paper bags than plastic bags because paper is recyclable whereas plastic is not. Plastic cannot be degraded and they pollute the environment; whereas paper is biodegradable and does not cause any pollution. Moreover, even if burned, paper will not cause much pollution but plastics on burning will release toxic chemicals into the environment thus polluting the environment.


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45

What type of substances are the major pollutants of the environment? Name two such substances.

45

Name the organisms whose uncontrolled activities are damaging the environment.

46

Which of the following constitutes a food chain?

47

In a food chain, the initial organism is usually:

Questions · 163
5. Our Environment
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