For years, I've been writing these daily stories about the existential crisis that is sea level rise for dozens of communities up and down the California coast. I wanted to take a longer-term view. A mega study by the U.S. Geological Survey from a couple of years ago projected that Southern California could lose more than two thirds of all its beaches by the end of the century if we continue business as usual. Another study showed wetlands could go extinct on the West Coast by the end of the century.