While global warming is still a threat, the decision to back away from a worst-case outlook raises questions about whether some risks have been overstated. By Brad Plumer and Eric Niiler An overhaul ...

Iceland has stood apart from the rest of Europe. But President Trump’s threats to Greenland have provoked a reconsideration. By Amelia Nierenberg and Sergey Ponomarev Aspects such as drone technology ...