The thing is, the basements are already below sea level, and everything is stable. Filling in the shoreline would keep active seawater away, and existing cathodic protection would continue to do its job. The erosion that effects the coasts would just be dealt with by the same means currenly employed… sure it might take a billion worth of fill over 30 years, but that’s a drop in the bucked compared to the losses avoided. I think it’ll be seen as just be a cost of doing business in the future.
