1.

What will happen if − (a) Forests, scrub and other vegetation is reduced. (b) Sewage carrying dangerous chemicals enters rivers. (c) Birds eat insects which have been killed by insecticides. (d) Poisonous substances are overused to prevent insects from destroying a crop. (e) A dam is built in a famine-prone region.

Answer»

What will happen if −



(a) Forests, scrub and other vegetation is reduced.



(b) Sewage carrying dangerous chemicals enters rivers.



(c) Birds eat insects which have been killed by insecticides.



(d) Poisonous substances are overused to prevent insects from destroying a crop.



(e) A dam is built in a famine-prone region.



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