Telegraph: Arctic sea ice is now retreating so quickly that scientists say there is now a 50-50 chance that it will have gone completely by September. Three research ships break through Arctic ice near the North Pole The Polar regions have been the first to show the critical changes brought by global warming and it will be a hugely symbolic moment if the North Pole is left surrounded by water. The sight of ships able sailing to the Pole for the first time would be seized on by …