Not a bad answer, presuming humanity is a thing to preserve (not proven). Though it answer the question "Should we eat meat farmed in a mass production way" much more than should we eat meat at all. There is a theory that we can use cows to reclaim deserts (https://www.ted.com/talks/allan_savory_how_to_green_the_worl...). Given your argument, we could eat those cows when they come to market since they should have a positive impact on the problem.

Edit: grammar clarification.