The effect of pollution is first marked on:

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(B) The effect of pollution is first observed on the green vegetation of an area. Plants are highly sensitive to atmospheric pollutants like $SO_2$,$N

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Green vegetation of an area

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(B) The effect of pollution is first observed on the green vegetation of an area. Plants are highly sensitive to atmospheric pollutants like $SO_2$,$NO_x$,and ozone. They act as bio-indicators because they show visible symptoms of damage,such as chlorosis,necrosis,or stunted growth,long before other organisms in the ecosystem exhibit significant stress. Therefore,green vegetation serves as the primary indicator of environmental pollution.

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