Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

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Canvas Classes · Accepted Answer

🧠 The Natural vs. Artificial Pollutants
Pollutants aren't always unnatural. Many nitrogen oxides () are produced by lightning or soil bacteria. The trick is to identify which oxide is generally considered the "Odd One Out" in the context of common environmental pollutants.

🗺️ The Nitrogen Oxide Catalog
1.  and : These are prime pollutants from vehicle exhausts and industrial furnaces, but also occur naturally in small amounts via lightning.
2. : This is an intermediate in high-altitude atmosp

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