Question

asl toppic on pollution class 12
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Answer 1

Answer:

Pollution means the presence of dangerous unnatural ingredients causing imbalance in the ecosystem and health hazards to human beings and animals. ... Such unnatural ingredients may be gases (causing air pollution), solids/liquids (causing water, food and land pollution) or sound (causing sound pollution).

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Answer 2

Answer:

pls see the attachment...

hope it helps out...

Better you see in Class 12 NCERT Book of Biology...