Definition of photochemical smog in English English dictionary
air pollution caused by photochemical reactions involving hydrocarbons, nitrogen oxides and other pollutants, especially in still air over cities
Air pollution produced by the action of sunlight on hydrocarbons, nitrogen oxides, and other pollutants
{i} smog produced by strong sunlight on nitrogen dioxide and hydrocarbons and other pollutants discharged by automobile exhausts which create a harmful haze