Scientific American: Investigating what is sometimes seen as one of the more favorable effects of climate change, a pair of scientists from UCLA has done a careful analysis of the melting of Arctic sea ice and concluded that it could lead to ships traversing the ice-free Northwest Passage (NWP) by 2050. It would also lead to much shorter transit times through the existing North Sea Passage (NSR). These developments may greatly reduce the time and cost of shipping but would also lead to unforeseen economic and geopolitical...