AYR, SCOTLAND - OCTOBER 27: A farmer in Ayrshire tends to his Highland Cattle on October 27, 2009 in Ayr, Scotland. Climate change campaigners have warned we must become vegetarians� to help save the planet, research claims that raising livestock is harmful to the environment and that vegetation would thrive on any unused farmland. Getty Images logo Getty Images 28 months ago

AYR, SCOTLAND - OCTOBER 27: A farmer in Ayrshire tends to his Highland Cattle on October 27, 2009 in Ayr, Scotland. Climate change campaigners have warned we must become vegetarians� to help save the planet, research claims that raising livestock is harmful to the environment and that vegetation would thrive on any unused farmland.

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