Scientists in Greenland have told Al Jazeera that an ice sheet that covers 80 per cent of the territory is shrinking much faster than expected. <br /><br />In recent months, unusually large chunks of ice have broken off its glaciers - one of them four times the size of the US city of Manhattan.<br /><br />Some experts are worried this increasing rate of melting could raise sea levels across the globe.<br /><br />Nazanine Moshiri reports from Illulisat in Western Greenland.
