"In response to complaints from neighbors, Norfolk Southern agreed Thursday to take more aggressive steps to clean up lung-damaging diesel pollution from equipment at the railroad's Englewood freight yard."

"CONCORD, N.H. -- Cleanup at one of the state's major Superfund pollution sites is moving into high gear."

"CENTRALIA, Wash. — Proposals to make the Northwest a major coal exporting region have made for a familiar debate over the potential impacts on people and the environment."

"Texas oil and gas officials are once again investigating whether gas drilling contaminated water wells in a neighborhood west of Fort Worth where similar charges gained national attention nearly three years ago."

"WILLIAMSPORT, Pa. -- A federal judge has approved settlement with a Texas firm over the discharge of fluids from a Marcellus Shale natural gas well site in Lycoming County."

"Japanese authorities, now struggling to contain leaks of radioactive groundwater from the wrecked Fukushima nuclear plant, were urged two years ago by U.S. experts to take immediate steps to prevent groundwater contamination but decided not to act on the advice."

"Two environmental activists who climbed an OAO Gazprom (GAZP) Arctic rig to protest planned oil extraction were taken into custody following warning shots from Russia’s Coast Guard."

"Colorado's richest oil field -- the Denver-Julesburg Basin -- is buried in floodwaters, raising operational and environmental concerns, as state and industry officials work to get a handle on the problem."

"There was never doubt that the deadly train derailment in Lac-Mégantic caused an environmental disaster, but a report made public this week by Quebec’s ministry of the environment details the extent of the devastation to the soil, river and lake near the disaster zone."

"California legislation that orders the first-ever state oversight of hydraulic fracturing neared final passage yesterday, even after nearly all environmental groups dropped their support."