A census of Costco carts on Thursday revealed little fear. Tariffs could go as fast as they’re coming, and our columnist is not stuffing his pantry.

© Kerry Tasker for The New York Times

For Greenlanders, there’s the same kind of acute uncertainty about the past and the future that people in and outside America are feeling right now.

There is excitement about the potentially lucrative resources scattered around the island, especially the rare earths. But extreme weather, fired-up environmentalists and other factors have tempered hopes of a bonanza.