Under extreme temperatures and pressures, nitrogen is forced to combine with oxygen in the combustion chamber to form oxides of nitrogen.

Name: Under extreme temperatures and pressures, nitrogen is forced to combine with oxygen in the combustion chamber to form oxides of nitrogen.
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During combustion in engines, the high temperatures and pressures force nitrogen and oxygen, which are normally unreactive, to combine and form various oxides of nitrogen (NOx), which are significant pollutants.

Under Extreme Temperatures and Pressures, Nitrogen Is Forced to Combine