"A last-ditch attempt at passing a climate change bill begins in the Senate this week with senators mindful that time is running short and that approaches to the legislation still vary widely, according to sources."

"A panel of eminent U.S. and European scientists has confirmed the widespread scientific consensus that the Earth's climate is warming due to human activities, but said they and their colleagues should have responded more quickly and effectively to news of an error in a major climate report and hacked researcher e-mails."

"The Obama administration has developed a five-year blueprint for rescuing the Great Lakes, a sprawling ecosystem plagued by toxic contamination, shrinking wildlife habitat and invasive species."

"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."