The amount of sea ice in the Arctic Ocean has fallen to a new record low, the latest evidence that global warming is intensifying. The National Snow and Ice Data Center said the ice cap has melted to 1.32 million square miles as of Sept. 16. That's significantly less than the 1.58 million square miles recorded on Aug. 26. "We are now in uncharted territory," NSIDC director Mark Serreze said Wednesday.
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