Cattle as well: http://www.npr.org/sections/thesalt/2014/04/11/301794415/gassy-cows-are-warming-the-planet-and-theyre-here-to-stay http://www.npr.org/sections/t

Cattle as well: http://www.npr.org/sections/thesalt/2014/04/11/301794415/gassy-cows-are-warming-the-planet-and-theyre-here-to-stay http://www.npr.org/sections/thesalt/2014/04/11/301794415/gas... There's even been action to reduce global warming from dairy cattle in California: https://phys.org/news/2016-11-california-dairy-cows-combat-global.html https://phys.org/news/2016-11-california-dairy-cows-combat-g... According to that last article: Livestock are responsible for 14.5 percent of human-induced greenhouse gas emissions, with beef and dairy production accounting for the bulk of it, according to a 2013 United Nations report. To imply that it's only livestock (or only sheep, for that matter), is not accurate.