Online Athens: Hurricanes Katrina and Sandy were separated by more than 1,300 miles and eight years, but they share one big thing in common, according to University of Georgia ecologist James Porter: They were exactly the sort of destructive superstorms we will see more frequently, as global warming advances and sea levels rise. No single weather event can be chalked up to global warming but climate scientists believe that warmer temperatures will fuel bigger and more frequent hurricanes, Porter told a University...