EcoWatch: After decades of obscurity, Paleo is now one of the fastest-growing diet trends. A 2013 survey found that one percent of Americans eat Paleo, which is based on the premise that our diets should be based on animals and plants, the way we ate when we were hunter-gatherers. Bestselling books like Grain Brain have redeemed meats nutritional profile and convinced many people that their high-carb diets promote unhealthy levels of brain and gut inflammation. I count myself among the throngs of Paleolistas...