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Greenhouse gas emissions increased by a record amount last year, to the highest carbon output in history, putting hopes of holding global warming to safe levels all but out of reach, according to unpublished estimates from the International Energy Agency.

A new process that simultaneously combines the light and heat of solar radiation to generate electricity could offer more than double the efficiency of existing solar cell technology, say the engineers who discovered it and proved that it works. The process, called 'photon enhanced thermionic emission," or PETE, could reduce the costs of solar energy production enough for it to compete with oil as an energy source.

"In 2009, the scientific literature caught up with what top climate scientists have been saying privately for a few years now: * Many of the predicted impacts of human-caused climate change are occurring much faster than anybody expected - particularly ice melt, everywhere you look on the planet. * If we stay anywhere near our current emissions path, we are facing incalculable catastrophes by century's end, including rapid sea level rise, massive wildfires, widespread Dust-Bowlification, large oceanic dead zones, and 9°F warming - much of which could be all but irreversible for centuries. And that's not the worst-case scenario! * The consequences for human health and well being would be extreme. That's no surprise to anybody who has talked to leading climate scientists in recent years, read my book Hell and High Water (or a number of other books), or followed this blog. Still, it is a scientific reality that I don't think more than 2 people in 100 fully grasp, so I'm going to review here the past year in climate science. I'll focus primarily on the peer-reviewed literature, but also look at some major summary reports."

A new UN report estimates that accounting for the environmental damage of the world's 3,000 biggest companies would wipe out one-third of their profits. Any precise figure, however, is a matter of how risk is quantified and of where you draw the line. In 2006, for example, the New Economics Foundation (NEF), of which I am the policy director, looked at the oil companies BP and Shell, who together had recently reported profits of £25bn. By applying the Treasury's own estimates of the social and environmental cost of carbon emissions, we calculated that the total bill for those costs would reach £46.5bn, massively outweighing profits and plunging the companies into the red.

In his thoughtful criticism of my essay on the future of fossil fuels and the poor prospects for renewable energy, Andrew Leonard characterizes my message as one that "we have nothing to worry about." This may be partly the fault of my presentation, because in the course of being provocative I did not make it sufficiently clear that I was engaged in analysis, not advocacy. I made the prediction that, even in the presence of global warming, the countries of the world are unlikely to allow the vast stores of fossil fuels in the earth's crust to lie there undisturbed, when technology is making many of them ever more accessible and cheaper than the renewable energy alternatives. For the record, I personally wish that greenhouse gas emissions would stop immediately, and I personally would prefer a world of harmonious international cooperation for all time. Neither of my personal preferences is going to be fulfilled and neither affects the accuracy of my analysis.

From record greenhouse gas emissions to the failed War on Drugs, here are the real scandals the media ignored