Am not sure. Pretty much agriculture is eating away vast tracts of forests. Be it in Brazil, India or elsewhere. Now is all agriculture done for food. Not really. Palm oil is an example with a ton of industrial and cosmetic use.
Turning 10 calories of corn into 1 calorie of beef is not the way to save the planet. A large fraction of corn and soybeans are fed to animals. If you want to talk about non-food usage, that's a different issue.
Using a computer, having running water, driving a car, etc are all wasteful activities. And yet in every other instance people seem happy to simply reduce their use to "save the planet". But vegans say you can't reduce meat consumption, you must eliminate it. This seems a stark contrast to everything else, if your argument is environmental damage.
