Weather Channel: Coastal cities around the world face a two-pronged problem: On one hand, there's a march of migration toward the coasts as people increasingly leave rural areas and move into urban areas, in search of better jobs and education.
On the other, global sea levels are steadily rising, even as the construction of big buildings and the extraction of groundwater puts pressure on the land, a phenomenon called subsidence that's being viewed with increasing alarm in places from Louisiana to Indonesia.
And...