New Orleans could be stranded on sliver of land if coastline fixes aren't made
                                
                                
                                    (Newser) -
                                    Over the past 80 years, at least 2,000 square miles of southeastern Louisiana's coastline have dropped off into the Gulf of Mexico—the equivalent of a football field-sized plot of land being swept away each hour,  Scientific American  reports. Unless the state takes action, 1,750 more square...