Anytime you drive a tractor or use fertilizer that creates greenhouses gases. It is then better for the environment to produce grass fed beef, right? But now it appears that grass fed beef produces more methane from the mouth of cows than corn fed beef. So now corn fed beef is better for the environment. But wait, this doesn't account for the greenhouses gases emitted from the corn production!
Anyone who thinks they can figure out the one best and only way to produce cattle commits The Fatal Conceit (look it up) through their hubris. I imagine the "best" way is a combination of corn and grass fed cattle, but I don't know. And neither do you.
(And no, the best method is not to abstain from beef! At least, not in my world of pastrami sandwiches on rye bread.)
