Question

Which of the following pollutants in atmosphere cause damage to the leaves of plants and retard the rate of photosynthesis?

• A. $N{O}_2$
• B. $S{O}_2$
• C. $S{O}_3$
• D. Both B and C

Answer 1

The correct option is D Both B and C

Both sulphur dioxide and sulphur trioxide screen out sunlight from the surface of the leaves by getting accumulated in the form of particulate matter. They also block the stomata opening which does not allow further pollutants to enter into the stomata. However, this also retards the rate of photosynthesis