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If you are a regular reader of Nature or Science, you will have seen with growing
alarm reports pointing to the accelerating collapse of some of the most important
planetary systems underpinning human survival. The Antarctic ice-shelf has contracted
by almost 2% since 1997; further loss and thinning could lead to substantial sea-level
rises. Climate change is causing rapid acidification of the Arctic Ocean, risking
long-lasting damage to the region s ecology. Climate effects are endangering the ability
of forests to mitigate adverse atmospheric changes, especially in the Amazon and North
America.