Question

7 multiple choice 2 points which of these is a primary air pollutant? sunshine oxygen trees sulfur dioxide 8 multiple choice 2 points which of the following is an example of a secondary pollutant? particulate matter (pm) ground - level ozone (o3) nitrogen dioxide (no2) carbon monoxide (co) 9 multiple choice 2 points what is the purpose of emissions testing for vehicles under the clean air act? to ensure vehicles meet certain pollution standards to encourage car manufacturers to use dirtier fuels to reduce fuel efficiency to allow cars to emit as much pollution as possible

Explanation:

• Question 7: Primary air pollutants are directly emitted into the atmosphere. Sulfur dioxide (\(SO_2\)) is a primary pollutant from sources like burning fossil fuels. Sunshine, oxygen, and trees are not pollutants.
• Question 8: Secondary pollutants form from chemical reactions of primary pollutants. Ground - level ozone (\(O_3\)) is a secondary pollutant formed from reactions of volatile organic compounds (VOCs) and nitrogen oxides (\(NO_x\)). Particulate matter (PM), nitrogen dioxide (\(NO_2\)), and carbon monoxide (\(CO\)) are primary pollutants.
• Question 9: The purpose of emissions testing under the Clean Air Act is to ensure vehicles meet pollution standards. Encouraging dirtier fuels, reducing fuel efficiency, or allowing maximum pollution are contrary to the Act's goals.

Answer:

1. Sulfur dioxide
2. Ground - level ozone (O3)
3. To ensure vehicles meet certain pollution standards