Residents walk across the frozen Songhua River in front of smoke stacks at Jiamusi,
in China's northeast Heilongjiang province Sunday Dec. 4, 2005.
(AP Photo/Greg Baker) | ASSOCIATED PRESS
Climate change has already left its mark "on all continents and across the oceans", damaging food crops, spreading disease, and melting glaciers, according to the leaked text of a blockbuster UN climate science report due out on Monday.
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