"Parks Canada has reintroduced a herd of plains bison to the country's oldest national park in Banff, Alberta, officials said on Monday, more than 130 years after the iconic North American animal last grazed the eastern slopes of the Canadian Rockies."

"The B.C. Court of Appeal has overturned a ruling that found laws protecting asbestos removal workers from the deadly substance were too complex to enforce."

"For nine years under Canada’s previous government, science suffered harsh restrictions. Now US scientists may be facing a similar fate".

"Rupture of 138,600 gallons is ‘not a major disaster’ but environmental advocates say it highlights their fears about the Keystone XL and Dakota Access projects".

"One of Canada’s most northerly communities reinvents its relationship with a thawing landscape."

"A pipeline in the western Canadian province of Saskatchewan has leaked 200,000 liters (52,834 gallons) of oil in an aboriginal community, the provincial government said on Monday."

"The Chief of Grassy Narrows First Nation is asking Prime Minister Justin Trudeau to commit in writing to cleaning up the mercury that has contaminated the river near his community. Late Monday, a spokesperson for Trudeau said the federal government will take action to deal with the Grassy Narrows mercury contamination 'once and for all.'"

"WAUKESHA, Wis. — This city has become the battleground for one of North America’s fiercest water wars, one that is taking the Great Lakes region into more uncharted legal territory in 2017."