The key problem of photochemical smog is nitrogen oxides (nitric oxide (II) and nitric oxide(IV)). Nitric oxide (II) is formed from oxidation of nitrogen in the atmosphere in the combustion process is then subjected to a series of transformations. Participation of nitric oxide (II) at photochemical processes, training and use of important radicals such as HO∙ and H2O, indicating the significance of the oxidation process of methane in the accumulation of ozone in the upper layer of the troposphere. We are currently considering the photochemical oxidation of methane is the main source of carbon monoxide in the atmosphere with all that in assessing the capacity of these divergent sources of CO exists.