"Royal Dutch Shell said an oil sheen near two of its offshore Gulf of Mexico oil and natural gas platforms was dissipating Thursday, and it was 'very confident' its installations were not to blame."

"BALTIMORE -- The Army Corps of Engineers unveiled its restoration plan for Chesapeake oysters on Tuesday, a bay-wide look that officials said moves past piecemeal efforts and selects targets for large-scale efforts."

"Lloyd's of London, the world's biggest insurance market, has become the first major business organisation to raise its voice about huge potential environmental damage from oil drilling in the Arctic."

"COLUMBUS, Ohio -- An environmental group sued the Ohio Department of Natural Resources this week because the agency has not turned over public records related to a new program that allows oil and gas drilling at state parks."

"Philadelphia's $2 billion plan to manage its storm water with green methods - porous pavement, green roofs, and a plethora of trees -- got the official nod Tuesday from the U.S. Environmental Protection Agency."

After 18 months of resistance from the White House Office of Management and Budget, the US EPA has withdrawn proposed guidelines for cleaning up dioxin-contaminated soil at polluted sites. EPA says other guidelines issued in the meanwhile made them unnecessesary. Environmental groups condemned the move and the chemical industry applauded it.

"Natural-gas companies are taking concerns about looming Interior Department 'fracking' regulations to the White House with efforts that include a meeting between a major producer and the Obama administration’s top regulatory official."

"Eleven environmental organizations are suing the U.S. Environmental Protection Agency to force it to better regulate toxic coal ash and citing recent groundwater contamination at 29 coal ash dump sites in 16 states, including two in Western Pennsylvania."