Gravitas: Greenland's 'zombie ice' to raise sea level by 10 inches

A new report says, Greenland's melting 'zombie ice' could raise global sea level by 10.6 inches. This could make floods more frequent & erode coastlines the world over. What's worse, scientists say there's no way to stop the ice from melting. Why? Palki Sharma Upadhyay explains.