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- Food and Agriculture Organization of the United Nations. Livestock’s Long Shadow. November 2006
- Koneswaran, G; Nierenberg, D. Global Farm Animal Production and Global Warming: Impacting and Mitigating Climate Change. Environmental Health Perspectives, National Institute of Environmental Health Science; May 2008.
- Pimentel, D; Pimentel, M. Sustainability of Meat-Based and Plant-Based Diets and the Environment. Department of Ecology and Evolutionary Biology, Cornell University. September 2003
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