You-tube and Google reflect back the interests that the logged in user selects, and pick out related materials.  So it should have been no surprise that I came across a you tube presentation, by Prof. Emeritus Guy McPherson, at Greenfield Community College, in the USA. Titled "The Twin Sides of the Fossil Fuel Coin". Guy McPherson has been following closely publications in Climate Science, and also our Oil based Economy and related financial system. I have embedded the You tube link below. I am duty bound to warn potential viewers, that what he has to say may be very distressing.

Global warming is now going unstable, non-linear, and unstoppable positive feed-backs on the climate system have already been activated. We are now in the age of climate chaos, or the end of scope of old computer linear predictive models. In 1990 the United Nations Advisory Group on Greenhouse gases, advised that 1 degree would be catastrophic. It was only economic advise that set the higher 2 degree advisory limit used since then, not climate science.

Around 4 degrees of warming,with associated ocean acidity, there may be no phytoplankton left in the ocean to generate 50% of global oxygen, and many land plants will have died. By the way that is only other source of the other 50% of global atmospheric oxygen. Humans may be able to tolerate a large range of temperatures, but not so the living creatures that supply the air we breathe and the food that we eat.  The only saving possibility that might, halt the human caused sixth great global extinction event, is an immediate, and total economic collapse of our oil dependent civilization. This isn't for sure, but if we act as if it doesn't matter, and somehow continue business as usual, we may well fail.

Last time 6 degrees warmer on this planet , the largest mammal alive was a small rat like creature, because warm blooded larger body sizes has trouble with thermo-regulation in such a hot humid environment.  Sweating is inadequate. Some snakes and reptiles, echoing the age of dinosaurs, were as "large as a bus"

We cannot pull the current carbon dioxide levels back out of the atmosphere, which will stay above a minimum of todays level for around a thousand years.

Not surprisingly for such a destructive global plague species, we have almost fully consumed our resource base of food and energy. The critical energy declining resource is still oil, which is now projected to decline on average about 4 per cent annually. This will be despite best efforts at fracking, and alternative biofuel ethanol, tar sands, shale oil, and foreign wars and occupations. The USA is preparing for Martial Law, in response to expected economic collapse.

Other versions of Guy McPherson's Presentations are available online.

"We must get rid of industrial civilization to safe humanity".

Looks like we might manage that, despite our best government efforts to keep consuming fossil fuel energy. Predictions of a final great industrial depression, have been coming out for a while. Sooner or later they are going to be right.  A final age of widespread gas and oil fracking is not going to continue for long. The worry is we might continue on coal for far too long.

"Industrial civilization is only a way to extinction". 

"The government is not your friend".

"Let go of the assumption that technology can solve these problems".

Prof McPherson claims that Bill McKibben of 350.org, and other climate scientists, are still mistakenly trying to save civilization. The last bastion of denial?

Guy McPherson evidently tries to practice what he preaches. More of his views on his own website . .

http://guymcpherson.com/2013/01/climate-change-summary-and-update/