Unclear on the concept
Feeling extra-ironic, I grilled a Uruguayan grassfed ribeye last night. It definitely tasted better than the last time I attempted a similar cut of the local product (which was a long time ago, because it was not good). Iodine-y and a little offal-y, without tasting off. But, please:
Amateurish back-of-napkin calculations based on Power Steer, metafilter, and a new variable I've invented called CMPG (carcass miles per gallon) reveal that each cow shipped from Montevideo to SFO requires 545 gallons of jet fuel, versus 284 gallons of crude for a US cornfed steer. [Obviously, I have no idea how good this is, but I'm sticking with this until someone comes up with some real numbers].
So if you base your consumption decisions on vague and uninformed desire to save the planet, don't eat South American meat. If you want to eat well and right, this is still the answer as far as I can see:
No "American," no human, should be denied the joy of dry-aged prime cornfed beef. This does not mean that we should be able to procure it from the drivethrough twice a day. And of course, we can't -- we can't even, as I learned last weekend, get it for $40 at more-or-less highly regarded restaurants that specialize in the product. So let's excercise a little impulse control, people. Grassfed beef tastes better than whatever you're eating now. Treat yourself to some real prime beef every now and then and you'll save on narcotics.