"Canada's federal pipeline regulator has ordered Enbridge to conduct a full engineering assessment of a troubled northern pipeline that has sprung several leaks in the last two months."

"WASHINGTON -- Cleanup workers, doctors, divers and Gulf Coast residents interviewed by a Washington watchdog group have reported health problems from the 2010 Gulf of Mexico oil spill, including blood in the urine, heart palpitations, kidney and liver damage, migraines, memory loss and reduced IQ."

"The U.S. Forest Service is expected in June to end two years of wrangling over whether to ban hydraulic fracturing, or fracking, in the George Washington National Forest."

"CHARLESTON, W.Va. -- Coal operators can and should take more aggressive steps to reduce dust emissions from blasting and heavy equipment at mountaintop removal mines, according to new studies released this week as part of a controversial industry-funded research project."

"Debra White Plume and Marie Brush Breaker Randall stood in the middle of Highway 44, alongside more than 70 other members of the Oglala Lakota Nation. For hours, they didn't budge -- much to the chagrin of some tractor-trailer drivers bound for the tar sands region of Alberta, Canada."

"Power producers such as Dynegy Corp. and Duke Energy Corp. are bracing for new U.S. rules on the water they discharge, standards that may impose further costs on the embattled coal industry."

"Supreme Court justices [Tuesday] appeared receptive to the trucking industry's call to strike down a Port of Los Angeles program designed to clean up some of the country's most diesel-polluted air."

"SPRINGFIELD, Ohio -- The U.S. Environmental Protection Agency will conduct tests at a Tremont City site containing buried barrels filled with 1.5 million gallons of hazardous waste."

"High benzene levels in groundwater have been detected about 1,400 feet downstream of the presumed source of a hydrocarbons leak northwest of Parachute, the state Department of Natural Resources said today."

"WASHINGTON -- The Obama administration’s nominee to lead the Environmental Protection Agency declined on Thursday to answer questions about a controversial new guide that suggests public health standards could be relaxed dramatically in the event of a nuclear attack or accident."

"MAYFLOWER, Arkansas -- Warren Andrews had just finished putting up balloons for his stepdaughter's 18th birthday party at their suburban home in Mayflower, Arkansas, when his wife came inside and said something was wrong."

"LITTLETON, New Hampshire -- A New Hampshire jury on Tuesday found Exxon Mobil Corp liable for $236.4 million in a civil lawsuit that charged the oil company had polluted groundwater in the state with a gasoline additive used to reduce smog in the 1970s and 1980s."

"A court ruling that the U.S. government must consider the environmental impact of 'fracking' on federal lands leased to oil companies offers opponents of the technique a useful weapon in the fierce public debate in California and other parts of the country."

"Environmental groups on Monday asked the Obama administration to extend the approval process of the Keystone XL pipeline, using last month's spill of heavy Canadian crude oil in Arkansas as their latest reason to delay the project."

"Toxic chemicals clinging to plastics could cause health problems for fish and other organisms in the Great Lakes."