Question

what is released most in air when fuels are burn?​

Answer 1

Answer:

nitrogen oxides

When fossil fuels are burned, they release nitrogen oxides into the atmosphere, which contribute to the formation of smog and acid rain. The most common nitrogen-related compounds emitted into the air by human activities are collectively referred to as nitrogen oxides.

Answer 2

Answer:

Since fossil fuels are hydrocarbons (made from hydrogen and carbon), burning fossil fuels releases an enormous amount of carbon dioxide into the air. When there's a major rise in the percentage of carbon dioxide in the air, the amount of heat captured by the carbon dioxide gas also increases.