New York Times: Humanity has long had a two-pronged reaction to environmental change girding against risks but also probing for opportunities. The spread of ice-free Arctic Ocean waters in summer is eroding shorelines and may be affecting Northern Hemisphere winter weather (the jury is out). But of course this change has also prompted enterprising shippers to test new trade shortcuts and led to projections of bountiful new fisheries. Luckily, the nations ringing the Arctic are recognizing the importance of going...