Which of the following is usually not an air-pollutant?

1.	Which of the following is usually not an air-pollutant?
Answer» <html><body><p> Nitrous <a href="https://interviewquestions.tuteehub.com/tag/oxide-1144484" style="font-weight:bold;" target="_blank" title="Click to know more about OXIDE">OXIDE</a></p><br/><br/><p>The six air pollutants are carbon <a href="https://interviewquestions.tuteehub.com/tag/monoxide-2842046" style="font-weight:bold;" target="_blank" title="Click to know more about MONOXIDE">MONOXIDE</a>, lead, ground-level ozone, nitrogen dioxide, particulate <a href="https://interviewquestions.tuteehub.com/tag/matter-22749" style="font-weight:bold;" target="_blank" title="Click to know more about MATTER">MATTER</a>, and sulfur dioxide.The combustion of gasoline and other hydrocarbon fuels in automobiles, trucks, and jet airplanes produces several primary air pollutants. Nitrous oxide (N<sub>2</sub>O), commonly <a href="https://interviewquestions.tuteehub.com/tag/known-534098" style="font-weight:bold;" target="_blank" title="Click to know more about KNOWN">KNOWN</a> as laughing gas, is used in surgery and <a href="https://interviewquestions.tuteehub.com/tag/dentistry-1914" style="font-weight:bold;" target="_blank" title="Click to know more about DENTISTRY">DENTISTRY</a> for its anaesthetic and analgesic effects.</p></body></html>

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