Antinuclear

By far one of the most important impacts of global warming in the coming decades will be sea-level rise. As the Earth heats up and ice sheets in Greenland and Antarctica melt, ocean levels will creep upward, flooding coastal cities and forcing large-scale relocations around the world.
But there’s a disturbing asterisk here: We still don’t know exactly how high oceans will rise this century. Studies have suggested it could be anywhere from 2 to 6 feet, on average — with newer evidence leaning toward the higher end, depending on how quickly parts of the massive ice sheet in West Antarctica disintegrate. Worse, climate scientists probably won’t be able to pin down an exact number anytime soon, because getting a handle on ice-sheet dynamics is inherently tricky.
That’s not reason for complacency, though. It actually makes preparation more urgent and difficult, because coastal cities will have to start mounting defenses…