Yep, would all be fine if they could just return the nitrogen in its original form.

It's mainly the ammonia (fertilizer runoff from fields and animal waste) that's a problem for nearby nature preserves and bodies of water, according to environmentalists who sued the government. Also livestock urine ammonia vapors and nitrogen oxides forming smog.

From a non-paywalled article: [https://www.science.org/content/article/nitrogen-crisis-jam-...]