My, how convenient this is for BigCorp agribiz.  You believe that the type of meat best produced by small, independent farmers on land that they own (and presumably care about) is “the most unsustainable”.

This reminds me of the time that I saw an advertisement proudly touting “corn-fed beef”, as if that were a good thing for anyone other than the large corporations that control the corn markets, and their pesticide providers, and the stockholders thereof, and their bankers.

Next, you’ll be telling me that rising sea levels will make Earth uninhabitable by the year 2000.  You are obviously not old enough to remember that, but I am...  Anyway, enjoy believing whatever garbage you have loaded into a brain that is operating suboptimally due to your vegan diet.