"You've heard of peak oil—the idea that the globe's easy-to-get-to petroleum reserves are largely cashed, and most of what's left is the hard stuff, buried in deep-sea deposits or tar sands. But what about peak phosphorus and potassium? ...These nutrients, which are essential for plants to grow, are extracted from soil every time we harvest crops, and have to be replaced if farmland is to remain productive."

"Ken Salazar, the secretary of the interior, announced on Thursday that he would not extend the lease of an oyster farm in the Point Reyes National Seashore in Northern California, allowing the estuary there to become a wilderness area."

"CHARLESTON, W.Va. -- A longtime Massey Energy executive has agreed to cooperate with investigators as they continue to try to work their way up the corporate ladder in their probe of the worst U.S. coal-mining disaster in nearly 40 years, federal prosecutors revealed Wednesday."

"Republicans stopped Sen. Jon Tester's (D-Mont.) Sportsmen's Act dead in its tracks Monday evening."

"GARY -- The warming planet is affecting Indiana Dunes National Lakeshore. From lower water levels in Lake Michigan to declining food sources for the endangered Karner Blue butterfly, climate change is having an impact on the national park."

"HUNTINGTON, W.Va. -- Patriot Coal has agreed to phase out mountaintop removal and other forms of strip mining, in a move Patriot officials say is in the best interests of their company, its employees and the communities where it operates."

"The presidential and congressional elections of last week brought good news for those who value sensible land conservation policies. But there was more good news on the state and local levels as well."