"MONTREAL — Parts of the Chaudière River remain contaminated despite weeks of cleanup operations and the removal of nearly 43 million litres of oily water from the river."

"Canada's failure to adopt a 'comprehensive national strategy or vision' for ocean science is confounding efforts to plan for the future and make efficient use of funding for ocean research, a new national report released Wednesday concludes."

"BISMARCK, N.D. -- A Canadian company has applied to build the largest oil pipeline yet from western North Dakota's booming oil patch and will soon begin courting oil producers to reserve space, a key step in a $2.6 billion project that would move millions of gallons of oil to Minnesota and Wisconsin."

"CHURCHILL, Manitoba -- A polar bear attack in Canada that left two people injured has brought new warnings from scientists of a dangerous rise in human-bear encounters in a warming Arctic."

"EDMONTON -- Geotechnical engineers remained at the Obed Mountain coal mine Sunday trying to determine how one billion litres of murky water leaked from a containment pond into the Athabasca River."

"HOUSTON -- Over the past two years, environmentalists have chained themselves to the White House fence and otherwise coalesced around stopping the Keystone XL pipeline as their top priority in the fight against global warming. But even if President Obama rejects the pipeline, it might not matter much. Oil companies are already building rail terminals to deliver oil from western Canada to the United States, and even to Asia."

"'American policymakers need to understand just who they will be doing business with if they approve the Keystone,' says environmental artist Franke James."

"SAN FRANCISCO -- Saying that the West Coast must lead the way in battling climate change, the governors of California, Oregon and Washington, along with the premier of British Columbia, signed an agreement Monday committing the Canadian province and the three states to coordinate global-warming policies."

"FORT CHIPEWYAN, Canada -- In the Cree language, the word 'athabasca' means 'a place where grass is everywhere.' Here in Alberta, the Athabasca River slices through forests of spruce and birch before spilling into a vast freshwater delta and Lake Athabasca."