Canada

"TransCanada Corp is formally requesting arbitration over U.S. President Barack Obama's rejection of the Keystone XL pipeline, seeking $15 billion in damages, the company said in legal papers dated Friday."

"The leaders of the United States, Canada and Mexico will pledge Wednesday to source half their overall electricity with clean power by 2025, according to administration officials."

"A first-ever estimate of the toll of asbestos-related cancers on society pegs the cost of new cases at $1.7-billion per year in Canada, and notes that is likely an under-estimate."

"Two B.C. First Nations leaders fighting a proposal to export liquefied natural gas from Lelu Island say Ottawa needs to recognize the hereditary rights of the Allied Tsimshian Tribes of Lax Kw’alaams."

"Ontario's climate change plan, which will provide billions of dollars in subsidies and incentives to businesses and homeowners, was greeted with cautious optimism Wednesday by environmentalists and businesses."

"Manitoba's cosmetic pesticide ban was supposed to keep weed killers like Roundup out of the battle against pesky yet harmless weeds, but a CBC News investigation found store after store flouting the rules."

"Some 2,000 residents of wildfire-ravaged Fort McMurray, Alberta, will not be able to return home this week as planned because of the risks posed by debris and contaminants including 'caustic' ash, Alberta Premier Rachel Notley said on Monday."

"A cloud of noxious particles brewing in the air above the Alberta oil sands is one of the most prolific sources of air pollution in North America, often exceeding the total emissions from Canada’s largest city, federal scientists have discovered."

"Evidence of a heart disease that has devastated commercial fish farms in Norway has been detected in British Columbia."