"Responding to renewed interest in geoengineering schemes to combat global warming, scientists and policymakers are beginning several efforts that could set new ground rules for research, including large-scale field experiments."

"China’s rise as a major solar module maker has been meteoric, but perhaps nowhere has its ascension been faster than in California, the United States’ largest solar market."

"The long term survival of polar bears is being threatened by man-made pollution that is reaching the Arctic. This conclusion comes from a major review of research into how industrial chemicals such as mercury and organochlorines affect the bears."

"UNITED NATIONS -- U.S. climate envoy Todd Stern today urged nations that signed the Copenhagen Accord to submit their greenhouse gas emissions-reduction targets and to hammer out details critical to implementing the broad agreement."

"Four of the world's largest and fastest-growing carbon emitters will meet in New Delhi this month ahead of a Jan 31 deadline for countries to submit their actions to fight climate change."

"Last year, reactive nitrogen was identified as one of nine key global pollution threats... ."

"Exhaust from cars and trucks exacerbates asthma in children and may cause new cases as well as other respiratory illnesses and heart problems resulting in deaths, an independent institute that focuses on vehicle-related air pollution has concluded."

"The treeless ecosystem of mosses, lichens, and berry plants is giving way to shrub land and boreal forest. As scientists study the transformation, they are discovering that major warming-related events, including fires and the collapse of slopes due to melting permafrost, are leading to the loss of tundra in the Arctic."

"The futuristic anti-whaling protest boat struck by a Japanese harpoon vessel near Antarctica finally sank on Friday, prompting Australia to voice official concern about safety in the remote Southern Ocean."

"Basalt formations off the East Coast of the U.S. could suck up a billion tons of carbon dioxide, according to a new study. Paleontologist Paul Olsen, of Columbia University's Lamont-Doherty Earth Observatory, explains how to get the CO2 into the rocks, and why scientists believe it won't leak out."