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Where do fossil fuel emissions come from? What is the main cause of pollution in general?

User Tim Sands
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emissions are produced through burning fuel for heat or any sort of power. this happens through chemical reactions. direct emissions mostly come from consuming fossil fuels for energy
User AndyT
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Answer:

Most of the nitrogen oxides released in the U.S. due to human activity are from the burning of fossil fuels associated with transportation and industry. When fossil fuels are burned, they release nitrogen oxides into the atmosphere, which contribute to the formation of smog and acid rain.

Step-by-step explanation:

User DzikiChrzan
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