Vox: The world's sea levels are expected to rise 1 to 3 feet -- or more -- as the planet heats up in the coming century. The more greenhouse gases we emit, the bigger the rise, but we've already locked in at least some sea-level increase no matter what.
So what should the millions of people living in low-lying coastal areas do?
Broadly speaking, there are three ways to deal with sea-level rise. First, large coastal cities like New York or Boston or Tokyo will likely spend billions to erect dikes...