Reuters: There’s no shortage of researchers lining up to tell us that climate change poses a big threat to coastal cities and their populations – from Dhaka to New Orleans to Mombasa. At the recent launch of the U.N.’s State of the World’s Cities 2008/2009 report, lead author Eduardo Lopez Moreno noted that 3,351 of the world’s cities are located in what’s known as the “low elevation coastal zone” – less than 10 metres above sea level. “In case there is an increase in sea level, there will be …