A new study in the journal Science uses one of the most comprehensive databases ever constructed to examine the impact of the agricultural sector on greenhouse gas emissions. Amazingly, more than 80 percent of farmland is used for livestock (in one way or another), but animal products account for just 18 percent of food calories and 37 percent of protein.

https://www.axios.com/growing-food-staggering-environmental-footprint-65a6d84e-3188-4b59-b68e-53dfe70a85de.html