BBC NEWS | Science/Nature | Arctic ice 'is at tipping point': "The National Snow and Ice Data Center (NSIDC) says that the ice-covered area has fallen below its 2005 level, which was the second lowest on record.
Melting has occurred earlier in the year than usual, meaning that the iced area could become even smaller than last September, the lowest recorded.
Researchers say the Arctic is now at a climatic 'tipping point'."
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