ILULISSAT, Greenland — Fisherman Helgi Áargil no longer knows what to expect on Greenland 's fjords, where he spends up to five days at a time on his boat with his dog, Molly, and the ever-changing northern lights in the sky as company. Last year, his boat got stuck in ice that broke off the nearby glacier. This year, it's been very wet instead. His income is just as unpredictable. An outing could bring him around 100,000 Danish kroner (about $15,700), or nothing at all. The Arctic's rapidly changing climate is bringing more questions for Greenland, the semiautonomous territory of Denmark that's been shaken by U.S. President Donald Trump's interest in owning it. While Trump's approach to Greenland has shifted, the world has been unable to slow the effects of climate change. The Arctic is warming faster than any other region in the world, driven by the burning of oil, gas and coal. What that means for the fishing industry that largely drives Greenland's economy is unknown. Fishing accounts for up to 95 percent of exports, many to the territory's biggest market, China, along with the Un