The Grass-Fed Revolution - TIME
This article provides a pretty good summary of some of the other things I've read regarding it. I think it tastes better and grass has a lot lower impact on the environment than cornfields do. I also like the fact that I can go to the butcher shop a mile away, and buy beef from a farmer three miles from my front door. It costs less than going to the supermarket around here too. I'm big on buying from small, local business where I can.