I don't see how beef production is an "ecological disaster". Please don't show me a link to some "professional" chicken little. There's always someone who claims doom and gloom, and they almost always leave out the parts that counter-act the doom & gloom part.
From an unbiased standpoint, humans are the ecological disaster. This planet can only sustain a certain population, and all the "support" we require. Interesting how "wild-life management" is readily embraced, but managing human life is unthinkable. I'm not suggesting that we start randomly exterminating humans. Just remove all the safety labels, and let nature decide.