Which of the following is not a cause of natural pollution ?

Options

A. Volcanic eruption
B. UV radiation
C. Forest fire
D. Mercury

Answer

D

Explanation

Natural pollution comes from natural sources like release of methane by cattle and paddy fields, carbon dioxide from plants and animals, dust storms, nitrogen oxides, ozone, volcanic eruptions, emission of natural gas, soil erosion, ultraviolet rays, etc. Mercury is not a cause of natural pollution.