BERLIN, GERMANY - NOVEMBER 28: Ice melts down the figure 'Two Degrees,' a figure used as a target to keep human-made global warming below, on the side of a carbon-neutral train about to depart for the COP21 2015 Paris Climate Conference at the Hauptbahnhof, or main train station, on November 28, 2015 in Berlin, Germany. The COP21 2015 Paris Climate Conference will begin on November 30, though due to the recent Paris terror attacks police have banned activists from marching. Large-scale marches are instead scheduled to take place in other cities, including in Berlin on November 29. (Photo by Adam Berry/Getty Images)
