Environmentally, AMP systems came out in the green, while feedlot emissions were in the red primarily because of feed-based nitrogen emissions from fertilizer.

again: when cattle farming is a problem, it's due to the petrochemical inputs, and not the cattle itself.

it all goes back to the oil in the end, and the need to find ways to leave it in the ground.

and, can we feed cows without oil? well, we did it for 9900 years...

https://www.sciencedaily.com/releases/2018/03/180319120133.htm