Polar Ice Cap Melt - see it here

Ice reflects the heat back into space.  As we lose ice, the heat does not reflect and heats up our atmosphere.  The less the ice, the more the heating.

http://www.politicususa.com/2014/03/05/watch-arctics-ice-not-so-magically-disappear.html

http://www.politicususa.com/2014/03/05/watch-arctics-ice-not-so-magically-disappear.html