"Alberta researchers say gender-bending fish swimming in the province’s southern rivers raise serious questions about whether the water is safe for people to drink."

"The State Department said it would delay its decision on a permit for a contentious $7 billion pipeline project intended to deliver crude oil from the oil sands of the province of Alberta in Canada, to refineries on the Texas Gulf Coast."

"West Coast oyster farmers are fielding calls from farmers on the Gulf of Mexico as the work begins to replace the shellfish breeding beds damaged by the massive oil spill. But while shellfish farmers in the Pacific Northwest are anxious to help, they say they have little to offer."

"A major U.S. government agency has thrown up a new political roadblock for a $12-billion TransCanada Pipelines project by questioning the need for a new pipeline to carry bitumen from Alberta's oilsands to American refineries."

"The Great Lakes are feeling the heat from climate change. As the world's largest freshwater system warms, it is poised to systematically alter life for local wildlife and the tribes that depend on it, according to regional experts."

"OTTAWA - Federal politicians from the government and opposition benches have mysteriously cancelled an 18-month investigation into oilsands pollution in water and opted to destroy draft copies of their final report."

"An international group of researchers is renewing its call for a global ban on the mining and use of asbestos, a known cause of cancer they say is unsafe in any form."

"Emerging details of accidental radiation exposure at an Ontario nuclear power plant  have triggered an order to investigate the possibility of similar incidents across the country, while raising doubts about safety at Canada’s only privately owned operator."

"As U.S. senators debate some of the most sweeping climate change laws in American history, a powerful lobbying effort led by Canadian officials and huge oil firms may be winning big concessions."

"Canada will phase out older coal-fired power plants to cut the country's greenhouse gas emissions, Environment Minister Jim Prentice said on Wednesday, as it moves to make natural-gas fired plants the new clean-power standard."