Pigs take a mud bath at the De Jofrahoeve pig farm in Esch, Netherlands. Dutch farmers treat their animals with almost three times the antibiotics that their Danish neighbors use. Robin Utrecht/AFP/Getty Images hide caption

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Revelers clink their beer mugs inside a beer tent on the last day of Oktoberfest in Munich. The festival drew some 6.9 million visitors this year.

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Passengers wait for flights in the check-in area of London's Terminal 3 at Heathrow Airport on Dec. 20, 2010. Peter Macdiarmid/Getty Images hide caption

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