Free radicals are important in many environmentally significant reactions. For example, photochemical smog, which forms as a result of the actions of sunlight on air pollutants, is formed in part by the following two steps.
NO2 ---UV Light--> NO + O
O + O2 --> O3
The product of this reaction, ozone, is a pollutant in the lower atmosphere. Ozone is an eye and lung irritant and also accelerates the weathering of rubber products. write Lewis strucktures of each of the reactants and products in the preceding reactions