Global warming now percieved as global ecological tipping



Scientists are seeing yet another level of global change: A "tipping point."

slashdot.org/ "earth-approaching-tipping-point-say-scientists#comments"

And a news release pointing to a group of scientific papers:

http://newscenter.berkeley.edu/2012/06/06/scientists-uncover-evidence-of-impending-tipping-point-for-earth/

First, I recommend reading the comments associated with the Slashdot post above. The comment-ors on Slashdot typically provide a wonderful parsing of the problem with many voices and viewpoints.