August 16, 2012 What could be worse than a ruptured pipeline of crude oil? A ruptured pipeline of tar sands oil — a thick, sticky substance. Cleanup of a 2010 spill in Michigan's Kalamazoo River took much longer and was far harder than anyone had anticipated. It's now a cautionary tale for people in the middle of the new Keystone pipeline's path.
August 15, 2012 South America's Chinchorro people lived in an extremely dry desert region where the dead turned into mummies naturally. But at some point, they stopped leaving the process to nature. Now, scientists say the Chinchorros began mummifying their dead as their climate grew wetter.
July 10, 2012 More than 800,000 gallons of crude oil gushed into wetlands and a creek in western Michigan in 2010 after a pipeline operated by the Canadian company Enbridge burst. Now, the National Transportation Safety Board says the company and the agency that regulates it are culpable.
May 17, 2012 Four years ago, an atmospheric scientist near Boulder, Colo., stumbled on surprising air pollution data: The region's levels of methane, a powerful greenhouse gas, were far higher than anyone would have expected. What was going on? The search for an answer led straight to the natural gas and oil fields of northern Colorado.
May 15, 2012 Hundreds of thousands of natural gas wells have sprung up across the country. In Garfield County, Colo., the drilling rigs are so close to homes that some people call them "Close Encounters." When the gas boom began a decade ago, residents began asking: Is it safe to live this close? Their quest for answers became too polarizing to pursue.
April 19, 2012 New EPA rules would control air pollution coming from wells being drilled by the oil and natural gas industries. The rules are a result of a lawsuit by an environmental group that sued the agency to clean up the drilling industry after communities in Colorado, New Mexico and Wyoming complained about air pollution.
April 18, 2012 The federal rules announced Wednesday will, among other things, soon require oil and natural gas drillers to limit air pollution from drilling operations. Though the requirements stand to save companies money long term, producers say pollution regulations should be left to the states.
February 10, 2012 Back from near-extinction, the gray wolf will soon be removed from the endangered species list. Now, Wyoming has struck a deal with the federal government to allow trophy hunting of the predator in certain parts of the state. But the move has drawn the ire of environmentalists.