A couple of months ago, Time Magazine ran a good article detailing a cornucopia of environmental and health problems stemming from our lousy food system. As they summarize

What we really need to do is something Americans have never done well, and that’s to quit thinking big. We already eat four times as much meat and dairy as the rest of the world, and there’s not a nutritionist on the planet who would argue that 24‑oz. steaks and mounds of buttery mashed potatoes are what any person needs to stay alive.