For each hamburger that originated from animals raised on rainforest land, approximately 55 square feet of forest have been destroyed. And its not just the rainforest. In the United States, more than 260 million acres of forest have been clear-cut for animal agriculture (2). With increased per capita meat consumption, and an ever growing population, we can only expect to see more deforestation in the future.
If you're concerned about how your diet affects rainforest depletion, but you still like eating meat, have you tried vegetarian meat substitutes?
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(1)Smithsonian Institution, "Smithsonian Researchers Show Amazonian Deforestation Accelerating," Science Daily Online, 15 Jan. 2002. (2)Earth Talk, "The Environmental Beef With Meat," The Bay Weekly, 6 Jan. 2005.