Secondary air pollutants are formed by
A)the evaporation of solvents and gasoline.
B)the incomplete combustion of fuels.
C)primary pollutants reacting with other compounds in the atmosphere.
D)radioactive substances such as radon reacting with primary pollutants.

Question

Quizplus · Accepted Answer

Secondary air pollutants are formed by primary pollutants reacting with other compounds in the atmosphere. Examples include ozone produced from the reaction of nitrogen oxides and volatile organic compounds in the presence of sunlight, and sulfuric acid formed from the reaction of sulfur dioxide with water vapor. The evaporation of solvents and gasoline (choice A) can contribute to the formation of primary pollutants, but not secondary pollutants. The incomplete combustion of fuels (choice B) can also form primary pollutants, but not necessarily secondary pollutants. Radioactive substances such as radon (choice D) can cause indoor air pollution, but they do not contribute to the formation of secondary air pollutants.

Secondary Air Pollutants Are Formed by