"Ten million scallops that have died in the waters near Qualicum Beach due to rising ocean acidity are the latest victims in a series of marine die-offs that have plagued the West Coast for a decade."

"An aging Enbridge pipeline that runs across Ontario has had at least 35 spills — far more than reported to federal regulators — but many municipalities along its route have never been informed of the incidents, a CTV W5 investigation reveals."

"Prime Minister Stephen Harper was again rebuffed in his bid to press U.S. President Barack Obama to approve the controversial Keystone XL pipeline when he raised the issue during a North American leaders’ summit in Toluca, Mexico."

"Canadian Prime Minister Stephen Harper’s frustration with U.S. President Barack Obama’s failure to approve the Keystone XL pipeline may make this installment of the North America summit, known as the “Three Amigos,” the frostiest since the annual meetings began almost a decade ago."

"MEXICO CITY -- The annual migration to Mexico of millions of orange-and-black monarch butterflies is one of the nation's cherished rituals. But it could come to a virtual halt if the insect's natural habitat is not urgently salvaged."

"YELLOWKNIFE – Plans to clean up what may be Canada’s worst toxic site are moving ahead with changes suggested by those who live beside Yellowknife’s Giant Mine."

"A 120-car Norfolk Southern Corp train carrying heavy Canadian crude oil derailed and spilled in western Pennsylvania on Thursday, adding to a string of recent accidents that have prompted calls for stronger safety standards."

"First Nations and conservation groups sue administration claiming violation of land treaty."

"Just weeks after a TransCanada natural gas pipeline exploded and left thousands of residents without gas in sub-zero temperatures, a CBC News investigation uncovered a 2011 report, buried by federal regulators, that criticized the company “for ‘inadequate’ field inspections and ‘ineffective’ management.”"

"Environmentalists are declaring victory over an announcement by Ottawa that it will conduct a health review of 23 pesticides."