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LONDON, ENGLAND - JANUARY 26: A 16 foot high sculpture of a polar bear and cub, afloat on a small iceberg on the River Thames, passes in front of Tower Bridge on January 26, 2009 in London, England. The sculpture was launched to provide a warning to members of parliament of the dangers of climate change and to launch Eden, a new natural history television channel. (Photo by Oli Scarff/Getty Images)

LONDON, ENGLAND - JANUARY 26: A 16 foot high sculpture of a polar bear and cub, afloat on a small iceberg on the River Thames, passes in front of Tower Bridge on January 26, 2009 in London, England. The sculpture was launched to provide a warning to members of parliament of the dangers of climate change and to launch Eden, a new natural history television channel. (Photo by Oli Scarff/Getty Images)