Well, my steak is out in the pasture and trust me, no oil is being wasted on it. Pure grass fed, no grain. I might raise some corn to fatten it up, but again, no tractor (don't have one) and fertilizer will be from the dairy farm on the other side of the road who don't use tractor, etc either.
If you want to know, most of our fertilizer comes from a nearby volcano... I kid you not.
Besides, you don't really get energy from protein, but from carbs.