We all know for sure there are a lot of methane gasses coming from livestock and we know the transportation of animals and their food and keeping the animals warm during winter is VERY bad for the environment. The exact number isn't important, if you just think rationally, you see it's bad. You can get all nutrients from plants and supplements and before you start saying it's healthier to feed supplements to animals, then eat the animal than eating supplements directly, first think that over again. I'm sure there's a type of netting, that goes over the bottom of the sea and destroys a lot of stuff. Like the universe intended to? You're one of those people who live like nature? Never go to docters and stuff?