"Colorado oil and gas industry regulators have given medical community leaders a written assurance that doctors can obtain and share trade-secret information about fracking chemicals for the purpose of treating patients and protecting public health."

"From California to the Great Lakes, persistent water pollution shows that no beach is an island when it comes to public health threats like hepatitis, dysentery and stomach flu."

"COLUMBUS, Ohio -- Federal environmental regulators are investigating a January chemical emergency at an Ohio oil well and asking why an inventory of the facility's chemicals wasn't available to local authorities, according to a letter released Wednesday by a coalition of activists."

"Natural gas has likely seeped into Northeast Pennsylvania water supplies from both deep gas drilling and natural processes, researchers at Duke University reported in a paper released Monday."

"Kish, the visible form of mill's pollution, 'invaded' homes, leaving residents to worry about health effects."

"The facilities will restore pumping of drinking water from scores of contaminated San Fernando Valley wells, lessening L.A.'s reliance on imported water, agency says."

"The surprise defeat of the farm bill in the House on Thursday underscored the ideological divide between the more conservative, antispending Republican lawmakers and their leadership, who failed to garner sufficient votes from their caucus as well as from Democrats."

"A federal environmental regulator will not finish and review a draft report tentatively linking hydraulic fracturing to Wyoming groundwater contamination and will instead allow state agencies to further investigate the issue."

"Haze from fires in Indonesia blanketing Singapore could persist for weeks or longer, Prime Minister Lee Hsien Loong said on Thursday, as the smoke drove air quality to "hazardous" levels and disrupted business and travel in the region."

"The brutally efficient coal-extraction method known as 'longwall mining' has permanently damaged a half dozen streams in Pennsylvania, state regulators have found — a finding that could trigger deeper waves for such operations in the state."

"A U.S. EPA draft report criticizes Washington state for lax oversight of the Hanford nuclear site, citing too few inspections and ignored violations."

"NEW ORLEANS -- Scientists in Michigan and Louisiana are predicting a big summer 'dead zone' in the Gulf of Mexico unless a tropical storm hits the area shortly before or during the annual measurement. In the Chesapeake Bay, scientists expect a smaller-than-average area where there's too little oxygen to support fish, shellfish and other aquatic life."

"DAMASCUS, Va. -- This is a heck of a bad time for the hellbender."

"HONG KONG -- China’s cabinet has adopted 10 measures to improve air quality in the latest move aimed at responding to the dense smog that has repeatedly enveloped Beijing and other major Chinese cities in recent years."

"None of the companies operating in Canada's tar sands have met a commitment to clean up the vast and expanding sprawl of toxic waste ponds, an official report has found."