What do you do with all the cows then!? Sure it sounds good to reduce our meat intake, but what if everyone became a vegan? Cows would go extinct, we wouldn't have MANURE to fertilize the vegetables we eat. IMO there is a BALANCE here, that is why God created animals. Until we start using human crap for fertilizer, there is a very large "balnce" God set into motion years ago.
Infact, I KNOW FOR A FACT that I fart WAY more when I eat only vegetables. In my wifes opinion that is enough CO2 equal to a whole mega farm in Ohio and enough methane to power a small suburb of Detroit