Question

which of the following contributes the most to the reaction that produces secondary air pollution from a combination of primary pollutants? gravity altitude sunlight pressure

Explanation:

Secondary air pollution is formed when primary pollutants react in the atmosphere. Sunlight often provides the energy (through photochemical reactions) for these reactions. For example, in the formation of photochemical smog, sunlight causes reactions between primary pollutants like nitrogen oxides and volatile organic compounds. Gravity mainly affects the settling of pollutants, altitude affects the distribution of pollutants in the atmosphere, and pressure can influence the movement of air masses but sunlight is more directly involved in the chemical reactions that produce secondary pollutants.

Answer:

sunlight