humans give off about 1L of flatulence per day, of which 5% is methane[1]. cows produce anywhere from 250 to 500L of methane per day[2] 1. https://pubmed.ncbi.

humans give off about 1L of flatulence per day, of which 5% is methane[1]. cows produce anywhere from 250 to 500L of methane per day[2] 1. https://pubmed.ncbi.nlm.nih.gov/1648028/ https://pubmed.ncbi.nlm.nih.gov/1648028/ 2. https://academic.oup.com/jas/article-abstract/73/8/2483/4632901?login=false https://academic.oup.com/jas/article-abstract/73/8/2483/4632...