Record-breaking 2014 was hottest in modern history

Greece's general index hit 841 points, an increase of 11.33 percent on Monday's close, before falling back slightly

Last year was the hottest in modern history, according to a report by US government scientists on Friday that found global warming reached a new and concerning level in 2014. The average for sea and land surface temperatures "was the highest among all years since record keeping began in 1880," said the report by the National Oceanic and Atmospheric Administration (NOAA).