Life on this planet is not possible without nitrogen compounds either. They are also pollutants that can harm people and other living creatures when too much of

Life on this planet is not possible without nitrogen compounds either. They are also pollutants that can harm people and other living creatures when too much of them enter the atmosphere and water. They were among the first pollutants to be recognized and controlled under the original Clean Air and Clean Water acts. "It's just plant food" is a bad reason to leave emissions of NOx, nitrates, and ammonia unregulated. "It's just plant food" is also a bad reason to leave CO2 emissions unregulated.