Which pollution is caused by Photochemical Smog?

The correct answer is option 1. Air Pollution.

Photochemical smog is a brownish-gray haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen. It comprises anthropogenic air pollutants trapped close to the ground by temperature inversion, primarily ozone, nitric acid, and organic chemicals. It causes air pollution.