Don't Bhaaaan Livestock!
There is the notion that removing livestock from production will lead to better and more sustainable practices. Its a nice idea thinking removing one item (meat) from humans list of consumable items will lead to a better and brighter future. Sadly, that's not how an ecosystem works, you can't just pluck one item out an ecosystem and find a balance which is harmonious for everyone and everything. Removing livestock could even damage farmers sustainable practices on less than ideal growing lands.