Most of the forest has been lost in tropical areas
B
Ozone in upper part of atmosphere is harmful to animals
C
Greenhouse effect is a natural phenomenon.
D
Eutrophication is a natural phenomenon in freshwater bodies.
Correct Option:
B
Explanation
This statement is wrong. Stratospheric ozone is beneficial because it absorbs much of the Sun's harmful ultraviolet radiation. By contrast, ozone close to ground level is an air pollutant. The natural greenhouse effect is essential for keeping Earth warm enough for life, and eutrophication can occur naturally, though human nutrient pollution greatly accelerates it.
