It should be classified under Climate Change!

On August 21, 2007, the Northwest Passage became open to ships without the need of an icebreaker. According to the Norwegian Polar Institute, this was the first time the Passage has been clear since they began keeping records in 1972. And in 2014 the Nunavik became the first cargo ship to traverse the passage unescorted when it delivered nickel from the Canadian province of Quebec to China.