Greenland's ice sheet has more than doubled its contribution to sea level increases in the last seven years.<br /><br />Glaciers are thinning at a dangerous rate and melting ice is pouring into the sea far faster than previously realised.<br /><br />The environmental group Greenpeace has sent independent scientists on an expedition to Greenland to investigate the reasons behind the rapid loss of ice.<br /><br />They found warm subtropical waters in the fjords and glaciers moving towards the sea at the alarming speed of up to 38 metres a day.<br /><br />Al Jazeera's Tim Friend reports.
