Ehh, I don't think the problem is so much that we eat meat, it is how we produce it. Beef for example is raised primarily with alfalfa, a legume that puts nitrogen in the soil for free rather than having to turn fossil fuels into nitrogen fertilizer or spending substantial fractions of the total world's electricity generation on its production. Plus the fertilizer from the cow shit itself. Its not like we are short on land capable of growing grass, farmland utilization has been dropping for decades, a lot of those places get regular rainfall and alfalfa is nearly free to grow and harvest.

Of course getting people to learn about these things and politicians to adopt sensible policies about it is a whole other game.