"Pennsylvania environmental regulators are pursuing a record $4.5 million fine against a gas driller over what they describe as a major case of pollution from a leaking waste pit."

"The League of Conservation Voters (LCV) has launched a grassroots operation to mobilize its members as volunteers in nine Senate races that they say are crucial to environmental progress."

"A European Union plan to label Canadian tar sands oil as highly polluting as part of its fight against climate change has been abandoned after years of opposition from Canada, clearing the way for exports of tar sands crude to the European market."

"YELLOWSTONE NATIONAL PARK – If you've hiked in the Northern Rockies above 9,000 feet, you've hiked among a whitebark pine forest."

"Here’s to the continual intellectual tussles that produce technological leaps like the super-efficient and durable LED light bulbs that are increasingly displacing incandescent and fluorescent bulbs (and sooty kerosene lamps) and garnered a Nobel Prize for three physicists on Tuesday."

"More than 80 organizations are asking the e-commerce company to follow the lead of Google and other tech giants and divorce itself from the American Legislative Exchange Council."

"The Environmental Protection Agency moved on Tuesday to increase the amount of data made available to the public on regulated chemicals."