Grass-Fed Beef vs. Grain-Fed Beef

From the article “Which Is Green: Grass-Fed or Grain-Fed Beef?” I found that because grass is harder to digest than grain they produce more methane. This would cause more methane being released into the environment, which is adding to greenhouse gasses. These same greenhouse gases are leading to the world heating up. So for all the meat eaters out there when you see the label for grain-fed beef, purchase that.  

http://www.opb.org/news/blog/ecotrope/which-is-greener-grass-fed-or-grain-fed-beef/