Researchers look over a map aboard the Finnish icebreaker MSV Nordica as it sets sail in the North Pacific Ocean toward the Bering Strait to traverse the Arctic's Northwest Passage on July 6, 2017. The Canadian government wants more study on the impacts of banning heavy fuel oil in the Arctic before it signs on to an international agreement to do so. It has been 16 months since Prime Minister Justin Trudeau and then U.S. President Barack Obama jointly committed to phase down the use of heavy fuel oils in the Arctic. THE CANADIAN PRESS/AP, David Goldman
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