Question

One of the effects of dust pollution is to cause

• A. Yellowing of leaves
• B. Opening of stomata
• C. Closure of stomata
• D. Folding of leaves

Answer 1

The correct option is C Closure of stomata

Dust pollution can be caused by any form of dirt like near roads, quarries, cement works and other industrial areas. This type of pollution apart from screening out sunlight blocks the stomata and lowers their conductance to CO${}_2$, simultaneously interfering with photosystem II and thus curtails photosynthesis.

So, the correct answer is option C.