"BP, the biggest oil field operator on Alaska's North Slope, has failed to fix pervasive management and environmental safety problems and is a repeat environmental offender, federal prosecutors said in a new court filing this week."

"The European Union's trade authority plans to start an investigation into whether U.S. bioethanol exporters are receiving unfair state subsidies and selling their fuel to Europe at illegally low prices, diplomats said on Tuesday."

"Shell Oil, ExxonMobil and Morgan Stanley are among the major oil and financial companies potentially on the hook for millions of dollars in civil fines tied to fraudulent renewable fuel credits — and that could be the tip of the iceberg."

"A Coast Guard admiral who led the government's response to the Deepwater Horizon disaster is taking over as the nation's chief overseer of offshore drilling safety, the Obama administration said Monday. Rear Adm. James Watson begins his post as director of the Interior Department's Bureau of Safety and Environmental Enforcement on Dec. 1."

The bankruptcy of the solar firm Solyndra has focused a lot of attention -- some of it politicized -- on clean-energy subsidies. While those subsidies have sparked something of a "gold rush" among clean-energy entrepreneurs, some clean-energy startups face serious economic challenges that may justify them.

"Nebraska and TransCanada Corp reached a deal on Monday that will see the state pay for environmental studies on a new route for the $7 billion Keystone XL pipeline that steers clear of the environmentally sensitive Sand Hills region and the Ogallala aquifer."

"The leading American effort to capture carbon dioxide from coal plants has hit a stumbling block that could imperil the project and set back a promising technology for addressing global warming, people involved in the venture said. "

"The Obama administration, under sharp pressure from officials in Nebraska and restive environmental activists, announced Thursday that it would review the route of the disputed Keystone XL oil pipeline, effectively delaying any decision about its fate until after the 2012 election."

"The State Department is considering a plan that would reroute the proposed Keystone XL oil pipeline from Canada away from environmentally sensitive areas of Nebraska, an action that could delay a final decision on the project until after the 2012 election."

"HONG KONG — The United States and China are gearing up for a trade war that could catch American users of solar energy in the crossfire."