By now, The Invading Sea has shed any reluctance to address climate-change head on, and we’re still beating the drum. Because the situation is going to get worse. As The Post said in our Sunday editorial: “In the next 15 years, experts expect the ocean to rise another 6 to 12 inches. Unless serious action is taken to curb greenhouse gas emissions, says the Union of Concerned Scientists, roughly 30 percent of Miami Beach and 25 percent of Key Biscayne will be chronically inundated by 2045. That’s the lifespan of a mortgage that a homeowner might be paying off now.”