Until recently the most that people tended to know about cold and sparsely populated Greenland is that it is not small and also that it is not Iceland. It’s a frigid autonomous territory of Denmark, but self-governing. Now what Björk once did for Iceland Donald Trump is doing for Greenland — putting it on the map. This has predictably caused some friction with the Danes, but there could be consequences down the road a long way away from Nuuk.