1. Investigate the role of transportation emissions in the formation of photochemical smog.

Transportation emissions play a significant role in the formation of photochemical smog. Photochemical smog is a type of air pollution that occurs when sunlight reacts with nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the atmosphere. These pollutants are primarily emitted from vehicles and industrial activities.When nitrogen oxides and VOCs are released into the atmosphere, they react with sunlight to form a variety of secondary pollutants, including ozone (O3), which is the primary component of smog. These secondary pollutants can further react with other compounds in the atmosphere, leading to the formation of a complex mixture of pollutants that contribute to the formation of smog.Transportation emissions are a major source of nitrogen oxides and VOCs. Vehicles emit nitrogen oxides as a result of the combustion of fossil fuels, while VOCs are emitted from a variety of sources, including gasoline, diesel, and other fuels used in vehicles. In addition, industrial activities, such as the production of chemicals and the burning of fossil fuels, can also contribute to the emission of these pollutants.In summary, transportation emissions are a significant contributor to the formation of photochemical smog. By reducing emissions from vehicles and industrial activities, we can help to reduce the formation of smog and improve air quality.