"A federal appeals court ruled today that the Department of Energy does not have to remediate two sites on Navajo Nation land that are adjacent to an old uranium mine."

"EPA Administrator Lisa Jackson spent an hour listening to residents of El Paso, Vinton, Westway, Sunland Park and other locations who spoke of health problems they believe are related to pollution from a steel plant, a landfill, chemical plants, dairies and Asarco, the shuttered smelter."

"The U.S. Environmental Protection Agency has proposed tight restrictions on using people as test subjects — or, as critics have put it, guinea pigs — in pesticide research."

"The United States said on Thursday farmers could proceed with planting genetically altered alfalfa without any of the restrictions that opponents say are crucial to protect organic and conventional farm fields from contamination."

"From the sometimes bizarre front lines of the climate-change culture wars: It seems the brothers Koch, proprietors of the giant, Kansas-based industrial conglomerate and well-heeled supporters of Tea Party causes, have now set their sights on a group of anonymous pranksters who spoofed a Koch Industries press release last month — one that suggested the brothers were having a change of heart on climate change."

"U.S. EPA's air division has made headlines under President Obama for its push to limit greenhouse gases and toxic pollution, but the busy office is running late with new limits on asthma-inducing soot, close observers of the rulemaking process say."

"Do we worry now about the consequences of our carbon-intensive lifestyle, or do we let our children cope? The answer has a considerable impact when assessing the economic costs of a warmer planet."

"A new study ranks West Virginia fourth in mercury pollution, a chemical closely tied to a number of health risks."

"The 'C-word,' climate, appears to have become to the Beltway what  the 'P-word,' population, has been in climate treaty negotiations for a long time — unmentionable."

"The cost of climate change impacts runs twice as high as previously estimated, according to revised data from a key economic model used by federal agencies."