Look up what happened in China with the NPN and melamine (there were others too, however this was the one identified)... kidney stones and failures... then they admitted and immediately set high limits of NPN allowed in infant formulas...
AND it is in all of our food and US to one extent or another...
Nitrogen pollution is bad news...
AND, this has FINALLY hit a few of them in the heads and woke them up to REALIZE the intricate interactions between the nitrogen and carbon cycles... at some point they may get the rest of it.
Damn, I don't even have a lab and this stuff is intuitive... where are the brainiac scientists?