photochemical smog

Photochemical smog occurs due to the action of sunlight on air pollutants, generating photochemical reactions. The principal constituents of the photochemical smog are gaseous hydrocarbons (leading to ozone formation) and oxides of nitrogen (NO x )..

When pollutants like hydrocarbons and nitrogen oxides combine in the presence of sunlight, smog is formed. This is a mixture of gases and since it is formed by photochemical reactions, it is called the photochemical smog. The word 'smog' is derived..

Smog is mixture of smoke and fog containing particulates. Two types of smog exist, classical or original smog and the more recent photochemical smog..

Smog is mixture of smoke and fog containing particulates. Two types of smog exist, classical or original smog and the more recent photochemical smog..

Hydrocarbons in air by themselves alone cause no harmful effects. However, they undergo chemical reactions in the presence of sunlight and nitrogen oxides. They form photochemical oxidants leading to photochemical smog. This causes irritation in the eyes and lungs lea..

="left">Chlorofluoro carbons (CFCs) Refngerators, air conditioners, foam shaving cream, spray cans and cleaning solvents. Destroy ozone layer which then permits harmful UV rays to enter the atmosphere. Nitrogen Oxides Automobile exhausts, burning of fossil fuels, forest fires,electric generation pl..