4. Goodland, R; Anhang, J. "Livestock and Climate Change: What if the key actors in climate change were pigs, chickens and cows?" WorldWatch, November/December 2009. Worldwatch Institute, Washington, D.C., USA. Pp. 10-19.
5. "Lifestock's Long Shadow: Environmental Issues and Options." Food and Agriculture Organization of the United Nations. 2006.
6. Jacobson, Michael F. "More and Cleaner Water." In "Six Arguments for a Greener Diet: How a More Plant-Based Diet Could Save Your Health and the Environment." Washington, D.C.: Center for Science in the Public Interest, 2006.
7. Oppenlander, Richard A. "Comfortably Unaware: What We Choose to Eat Is Killing Us and Our Planet." New York City: Beaufort Books, 2012.
8. Ibid.
9. "Water Trivia Facts." United States Environmental Protection Agency.
10. Oppenlander, Richard A. "Food Choice and Sustainability: Why Buying Local, Eating Less Meat, and Taking Baby Steps Won't Work." Minneapolis, MN: Langdon Street, 2013. Margulis, Sergio. Causes of Deforestation of the Brazilian Rainforest. Washington: World Bank Publications, 2003.
11. Thornton, Phillip, Mario Herrero, and Polly Ericksen. "Livestock and Climate Change." Livestock Exchange, No. 3 (2011).
12. Pimental, D., Pimental, M. "Sustainability of meat-based and plant-based diets and the environment." American Journal of Clinical Nutrition, Vol. 78, 660s-663S, September 2003.
13. "Water Footprint Assessment." University of Twente, the Netherlands.
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