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The Obama administration's carbon tax spokesman - the one who should sell this to the country - should be the president's national security adviser, Gen. James Jones, not the environmentalists. The imposing former head of the Marine Corps could make a powerful case that a carbon tax is vitally necessary to stimulate investments in the clean technologies that would enable the U.S. to dominate E.T., while also shifting consumers to buy these new, more efficient and cleaner power systems, homes and cars. He could make the case that the country with the most powerful clean-technology industry in the 21st century will have the most energy security, national security, economic security, healthy environment, innovative companies and global respect. That country must be America.

An unusually high proportion of thinner 'first year' ice in the Arctic raises the prospect of an acceleration in the loss of ice during the warmer summer months

The world has only six years left to limit greenhouse gas emissions, Pachauri warns. "It's essential that we take action by which we allow emissions to peak no later than 2015," he says, to limit the world's temperature increase to 2C. Beyond that and we reach a tipping point when the world's poorest communities will suffer the most. "They are the ones who are the most vulnerable" due to a much greater scarcity of water, a decline in agricultural lands, and the danger of sea level rises, as spelt out in the fourth assessment report by the UN Intergovernmental Panel on Climate Change.

The draft measure, written by Representatives Henry A. Waxman of California and Edward J. Markey of Massachusetts, sets a slightly more ambitious goal for capping heat-trapping gases than Mr. Obama's proposal. The bill requires that emissions be reduced 20 percent from 2005 levels by 2020, while Mr. Obama's plancalls for a 14 percent reduction by 2020. Both would reduce emissions of carbon dioxide, methane and other greenhouse gases by roughly 80 percent by 2050.

At the moment, global emissions are thought to be rising at nearly 3 per cent a year - so turning that into a 3 per cent annual cut would be a gigantic slashing of what the earth's factories and motor vehicles are pumping into the atmosphere. There is as yet nothing remotely like that on the table for potential agreement in Copenhagen, and if a deal of this ambition were to be done, it would be regarded as a triumph. Yet even with that, the Hadley Centre research suggests, the chances of keeping the rise down to about 2C by 2100 would be only 50-50. Furthermore, the simulations suggest that there is a worst-case scenario - about a 10 per cent chance - of the rise by the end of the current century reaching, even with these drastic cuts, a level of 2.8C above the pre-industrial, which is well into disaster territory.

Unlike the Kyoto Protocol, the BAP affirms the importance of reducing deforestation, which accounts for 17 to 20 percent of the world's annual greenhouse gas emissions, as a strategy for mitigating climate change. It specifies "policy approaches and positive incentives on issues relating to reducing emissions from deforestation and forest degradation in developing countries" (REDD) to be included in the NAMAs that countries can undertake (UNFCCC 2007, 3; FCCC/ CP/2007/6/Add.1 Decision 1). For many experts, the term REDD has become synonymous with a carbon-financing approach, in which the developing countries' reduction of emissions from forests is supported by the developed countries' purchase of carbon credits, which they can use to meet their own emissions reduction or other obligations.

Though the team is not yet ready to definitively pin the cause of the increased erosion rate on any one factor, changing conditions such as declining sea ice extent, increasing summertime sea-surface temperature, rising sea level, and increases in storm power may have all contributed to the coastal decline.

Yvo de Boer, the U.N.'s climate chief, called the meeting "very positive and constructive" and said it was "helped tremendously" by the support of Obama and Secretary of State Hillary Clinton. "There was a recognition around the table that this is a global crisis that cannot be solved without a global response," de Boer said. "There is a universal recognition that the whole world needs to act on this. .................. "China, he said, is now the largest investor worldwide in clean energy technology. "I think many people are not aware of that," he said. And according to a report by HSBC Global Research in February, almost 40 percent of the spending in China's economic stimulus package is supposed to go toward renewable energy, electric grid improvements, pollution control efforts, and other clean-energy-related projects.

From Colorado to Washington state, an unprecedented, years-long epidemic of mountain pine beetle has killed 2.6 million hectares (6.5 million acres) of forest. The insect has struck even more devastatingly to the north, in British Columbia, where clouds of beetles have laid waste to 14 million hectares (35 million acres) - twice the area of Ireland. It is expected to kill 80 percent of the Canadian province's lodgepole pines before it's finished. Farther north, in the Yukon, the pine beetle isn't endemic - yet. Here it's the spruce bark beetle that has eaten its way through 400,000 hectares (1 million acres) of woodland, and even more in neighboring Alaska, in a 15-year-old epidemic unmatched in its longevity and extent.

Climate Change - ADB Programs: Strengthening Mitigation and Adaptation in Asia and the Pacific

"Unless we act dramatically and act fast, science tells us our way of life is in jeopardy," [Senate Foreign Relations Committee Chairman Kerry] said.

Oxfam Australia says that climate change could leave up to 75 million people in the Asia-Pacific region homeless by 2050. The Future is Here: Climate Change says that these island nations are already suffering from drought, food shortages and rising water levels.

A majority of Americans continue believe that climate change is correctly portrayed or even underestimated in the news media, but a record high 41 percent believe risks are exaggerated. It's a vocal 41 percent, and they draw on a stock set of arguments to attack the credibility of scientists, politicians and environmentalists who claim that humans are spurring dangerous climate change. Like me, you may wonder where these arguments come from and whether they have any validity. The most common argument, and the one I will focus on in this first of several installments, is that many credible scientists dispute the theory of anthropogenic (or human-caused) climate change asserted by U.N. scientists in the 2007 IPCC report that found that humans were almost certainly causing the climate to change.

A majority of Americans continue believe that climate change is correctly portrayed or even underestimated in the news media, but a record high 41 percent believe risks are exaggerated. It's a vocal 41 percent, and they draw on a stock set of arguments to attack the credibility of scientists, politicians and environmentalists who claim that humans are spurring dangerous climate change. Like me, you may wonder where these arguments come from and whether they have any validity. The most common argument, and the one I will focus on in this first of several installments, is that many credible scientists dispute the theory of anthropogenic (or human-caused) climate change asserted by U.N. scientists in the 2007 IPCC report that found that humans were almost certainly causing the climate to change. San Francisco Chronicle : The Thin Green Line : Cameron Scott

"Climate change is the greatest challenge facing this and future generations," he said at a press conference in New York. "Emissions are rising and the clock is ticking."