Photochemical smong result from the interaction of pollution in the presence of

Photochemical smong result from the interaction of pollution in the presence of sunlight. The photochemical smog is result of the chemical reaction in the air between the sunlight, nitrogen oxides and volatile organic compounds.

It is noticed as a brown haze above cities. The negative effects are: production of chlorofluorocarbons (CFCs) increased UV radiation, irritation to the eyes, nose, and throat.