"WASHINGTON — If the Keystone XL pipeline is not built — and more oil from the Canadian oil sands is moved by rail — there could be hundreds more deaths and thousands more injuries than expected over the course of a decade, according to an updated State Department analysis of the contested project that was released Friday."

"Design problems with a blowout prevention system contributed to the 2010 Deepwater Horizon oil rig disaster, and the same equipment is still commonly used in drilling four years after the Gulf of Mexico oil spill, according to a report issued by the federal Chemical Safety and Hazard Investigation Board."

Colorado's experience may prove that EPA's new carbon rule is survivable.

"President Barack Obama’s plan to fight global warming underestimates pollution from natural gas, according to scientists studying how leaks affect the climate."

"SAN FRANCISCO -- Environmental advocates seeking to curb Chevron's plans to modernize and expand its Richmond oil refinery sued Bay Area air-quality regulators Thursday, claiming they approved construction based on outdated reports that understated the plant's greenhouse gas emissions and the pollutants it would spew into surrounding neighborhoods."

"Federal safety regulators warned on Thursday that another disastrous offshore oil well blowout could happen despite regulatory improvements in the four years since a BP well explosion in the Gulf of Mexico killed 11 workers and dumped millions of gallons of oil into the sea."

"Will Russian President Vladimir Putin get richer thanks to a sweetheart government coal deal in Montana? Last month the Treasury Department informed Congress that Mr. Putin personally held an interest in an international oil and gas investment fund called the Gunvor Group, run out of Geneva, Switzerland. Team Putin adamantly denied his involvement, but the Treasury Department insisted it was right."

"Hundreds of scientists have signed a letter sent to Canada’s prime minister blasting a federal review recommending the approval of the Northern Gateway tar sands pipeline as biased, Canadian media reported."

"A new University of Waterloo report warns that natural gas seeping from 500,000 wellbores represent 'a threat to environment and public safety' due to groundwater contamination, greenhouse gas emissions and explosion risks wherever methane collects in unvented buildings and spaces."

"The United States slapped new import duties on solar panels and other related products from China on Tuesday after the Commerce department ruled they were produced using Chinese government subsidies, potentially inflaming trade tensions between the two countries."