'Reverse course or face extinction' - California Governor, Jerry Brown

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alifornia Governor Jerry Brown, in an ominous appeal on climate change, says that the world may already have "gone over the edge" on global warming and that humanity must reverse course or face extinction.

"We don't even know how far we've gone, or if we've gone over the edge," Brown said on Tuesday (local time) at a climate summit at the Vatican. "There are tipping points, feedback loops - this is not some linear set of problems that we can predict. We have to take measures against an uncertain future which may well be something no one ever wants. We are talking about extinction. We are talking about climate regimes that have not been seen for tens of millions of years. We're not there yet, but we're on our way."

Brown, addressing dozens of mayors and other local government officials from around the world, issued his typical criticism of Republican politicians and business interests skeptical of climate change, calling them "troglodytes" to applause.

Brown went beyond his partisan rabble-rousing, however, quoting balefully from St. Paul's biblical message to the Galatians.

"God is not mocked," Brown said, "for whatsoever a man soweth, that shall he also reap."

Read the Stuff.co.nz story - “California governor's climate warning: 'We are talking about extinction’”.