“Is Grass-Fed Beef Really Better for You, the Animal and the Planet?” The Washington Post, Tamar Haspel, 23 Feb. 2015, www.washingtonpost.com/lifestyle/food/is-grass-fed-beef-really-better-for-you-the-animal-and-the-planet/2015/02/23/92733524-b6d1-11e4-9423-f3d0a1ec335c_story.html.