Herald: Climate scientists have warned that sea levels could rise by twice as much as previously projected as they presented the latest research on global warming. A 2007 report by the Intergovernmental Panel on Climate Change (IPCC) predicted a sea level rise of 7in to 23in by the end of the century, but scientists meeting in Copenhagen yesterday dismissed those estimates as too conservative, saying new data suggested the rise could exceed 39in and was unlikely to be less than …