Negative externalities: What's the true price of beef and cheese?

I yet haven't done the work to validate this completely to my own satisfaction, but there is another view worth considering here: https://www.ted.com/talks/allan_savory_how_to_fight_desertif...

I do think that scientific reductionism is a blind spot, one that I've been as guilty of as anyone else. Economics has the same issue, because it was fashionable to imitate physics...