The CDC rarely gets requests to investigate cancer clusters, and it is rarer still that the agency finds a cancer cluster exists, much less what caused it.

"By certifying species as endangered, government programs can backfire."

"Chinese government officials signed an agreement on Tuesday with First Solar, an American solar developer, for a 2,000-megawatt photovoltaic farm to be built in the Mongolian desert."

"The Environmental Protection Agency agreed Friday to update its standards on radon emissions from uranium mills."

"Developing nations' urgent need for more energy has become a central issue this year as developed countries -- including the United States -- push for a global reduction in carbon emissions ahead of a climate change conference scheduled for December in Copenhagen."

"Yorba Linda, close to one of last year's major burn areas, is among cities trapping and killing the predators. Animal activists object, and more debate is planned."

"While [Van] Jones was criticized as a left-wing zealot, the Obama team's record so far on the environment has been far from radical."

"Citing 'clear evidence' of likely environmental damage, the Obama administration has moved toward revoking the largest mountaintop-removal permit in West Virginia history."

After the dolphin hunt in Taiji, Japan, was covertly filmed in the award-winning documentary, "The Cove," no hunting seemed to be going on on the opening day of this year's hunting season.

"The American West is losing its autumn colors as global warming begins to bite and there is far more at stake than iconic scenery."

"Government researchers have confirmed the ideal testing ground for electric cars: the U.S. Postal Service. Now all they have to do is find the money to pay for it."

"Differences between rich and developing countries prevented G20 finance ministers from agreeing measures on Saturday to curb global warming, casting more doubt on U.N. efforts to agree a new climate treaty."

"Caves are home to some of the planet's most unusual creatures and important drinking water supplies. Now these underground resources are being polluted by surface activities, ranging from sewage spills to old factories. Experts call the problem 'extensive and serious.' Mammoth Cave National Park in Kentucky, Crevice Cave in Missouri and Whispering Canyon Cave in Alaska are examples. 'People need to be aware that there’s a subterranean ecosystem and that what happens on the surface impacts these unique ecosystems in a very real way,' said David Culver, a biologist at American University."

"Japan's prime minister-elect said on Monday he will forge ahead with a tough 25 percent cut in emissions by 2020, despite growing opposition from industry which says the target will hurt the world's No. 2 economy."

"An important opposition deputy this week accused Chile's government of being less than candid with the public about alarming levels of fine particulate pollution found in the nation’s leading cities."