Off topic, never mind ... cows/cattle have been part of our story for millennia. Someone posted a video earlier that mentioned cows being responsible for 18% of the world's methane gases so here is a good news story.

https://www.irishtimes.com/news/ireland/irish-news/seaweed-shown-to-reduce-99-methane-from-cattle-1.3156975#.WWxtyaPbbSQ.twitter

I don't know much about stuff like this but this sounds really good.