CO2 isn't pollution.
Although carbon dioxide may get more press, “the nitrogen cycle has been altered more than any other basic element cycle,” says John Aber, vice president for research and public service at the University of New Hampshire.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1247398/
But nothing will be down about the worst pollant because,
Global Fertilizer Market Report 2021: Market was US$ 83.5 Billion in 2020 and is Estimated to be Worth $93.9 Billion by 2027.
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