Greenland Ice tipping point

This article from the Huffington Post was sent to me by Charles Goodman with the note:

“For now, the ice sheet is still safe,” he said. “Its tipping point hasn’t been crossed yet. But if warming continues, it’s very likely that it will be crossed.”
If the entire Greenland ice sheet were to melt, it would cause a global sea level rise of more than 20 feet.  [6 meters].



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