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Nitrogen oxides from gas-burning cars and trucks that do not change form in the atmosphere are considered to be
primary pollutants from a stationary source
primary pollutants from a mobile source
secondary pollutants from a stationary source
secondary pollutants from a mobile source


Sagot :

Answer:

the answer is B

Explanation:

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The answer is B because cars are mobile vehicles and are a primary source of pollution in the world.