How wind, waves and pigs’ muck are fuelling a revolution on AIM. Over the past couple of years, London's Alternative Investment Market has seen dozens of companies list which promise to help take us to a future no longer dependent on fossil fuels. [News Source]

New NASA policy backs free discussion by scientists. Two months after NASA's top climate scientist complained that political operatives in the agency's press office were trying to censor his views on global warming, NASA issued a new communications policy. [News Source]

China crucial to climate debate. The high economic growth rates of China and India-- 8 percent to 10 percent this year for China and about 7 percent to 8 percent for India -- are cause for concern when is comes to climate change. [News Source]

Executive in pledge to cut greenhouse gas output by 2.7m tonnes. Ministers called on every household and business to play a part in reducing emissions equivalent to 2.7 million tonnes of carbon a year by 2010 compared to 2000. [News Source]

Air over Antarctica is warming, scientists say. In the winter sky over Antarctica, scientists have detected a vast cap of steadily warming air, in the first sign that record levels of greenhouse gases in the atmosphere may be trapping heat above the ice sheets of the South Pole. [News Source]

Antarctica’s atmosphere warming dramatically, study finds. The air over Antarctica has warmed dramatically over the past 30 years, according to a new study of archived data collected by weather balloons floated over the icy continent. [News Source]

Balloon data confirms Antarctic warming trend. A new analysis of the past 30 years of records from nine research stations reveals that the air above the entirety of Antarctica has warmed by as much as 0.70 degree Celsius per decade during the winter months. [News Source]

Unexpected warming in Antarctica. Winter air temperatures over Antarctica have risen by more than 2C in the last 30 years, a new study shows. [News Source]

Are shifts in Earth’s crust causing New Orleans to sink? Hurricane Katrina focused attention on another long-term problem: The city and the region around it are sinking. [News Source]

Gregoire signs alternative fuels bill. Beginning in 2008, it requires Washington fuel suppliers to ensure that two percent of the diesel is biodiesel and two percent of the gasoline is ethanol. [News Source]

RWE plans 1 bln euro clean-coal power plant. Utility RWE plans to invest a billion euros (US$1.20 billion) in the world's first large-scale power station based on clean-coal technology. [News Source]