"i'm a beach kid. I grew up in orange county, and that was my exposure, first exposure to the natural world," he says. "All the beaches are essentially doomed. It only takes a couple of meters of sea level rise to have them all be under under even at low tide." The more we can slow sea level rise,. the more we can stop it from getting bad, the better off the beaches will be. But as you pointed out, also,  a tenth of the world's population live within 30 or forty miles of the coasts on purpose because that's where the world economy is connected. Up, et cetera.