"General Electric Co. and the U.S. Environmental Protection Agency offered different lessons Wednesday on the first year of PCB Hudson River dredging -- starting with how much PCBs were removed."

"A North Carolina congressman said Thursday that he wants an investigation into reports that levels of a cancer-causing chemical in tap water at a Marine Corps base were downplayed and then omitted from official documents."

"Leaders from Montana and British Columbia signed an agreement Thursday banning mining and drilling in a valley along the U.S.-Canadian border north of Glacier National Park."

"State and federal officials were, at one point, looking at almost a complete loss of support from Asarco for projects to clean up contaminated sites. Then, a dramatic recovery of copper prices lead to benefits for Tacoma, Everett, and elsewhere in the state."

"A leak of more than 3,500 pounds of toxic ammonia gas from the Dow Chemical Co. facility in Institute [WV] went undetected for nearly two weeks, company officials disclosed Wednesday."

"Australia's prime minister on Friday set a November deadline for Japan to stop its research whaling program that kills hundreds of whales a year in Antarctic waters, or else face legal action."

"The U.S. House Energy and Commerce Committee said on Thursday it was investigating the potential impact of hydraulic fracturing on the environment and human health."

"The cost of pollution and other damage to the natural environment caused by the world's biggest companies would wipe out more than one-third of their profits if they were held financially accountable, a major unpublished study for the United Nations has found."