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This photo taken on September 2, 2009 in Longyearbyen, Norway, shows a vault carved into the Arctic permafrost filled with samples of the world's most important seeds in case food crops are wiped out by a catastrophe. UN chief Ban Ki-moon toured the facility today, as he urged world leaders to act now to halt global warming. Aimed at safeguarding biodiversity in the face of climate change, wars and other natural and man-made disasters, the seed bank has the capacity to hold up to 4.5 million batches of seeds, or twice the number of crop varieties believed to exist in the world today. AFP PHOTO/Jacqueline Pietsch (Photo credit should read JACQUELINE PIETSCH/AFP/Getty Images)

This photo taken on September 2, 2009 in Longyearbyen, Norway, shows a vault carved into the Arctic permafrost filled with samples of the world's most important seeds in case food crops are wiped out by a catastrophe. UN chief Ban Ki-moon toured the facility today, as he urged world leaders to act now to halt global warming. Aimed at safeguarding biodiversity in the face of climate change, wars and other natural and man-made disasters, the seed bank has the capacity to hold up to 4.5 million batches of seeds, or twice the number of crop varieties believed to exist in the world today. AFP PHOTO/Jacqueline Pietsch (Photo credit should read JACQUELINE PIETSCH/AFP/Getty Images)
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