Looking at the ancient evidence, Ward notes that ice caps began to shrink. "Melting all the ice caps causes a 75-meter increase in sea level. [That] will remove every coastal city on our planet."
Not going to happen. But if things continue, Greenland will be ice-free in a few hundred years. That means "only" 7 m of sea level increase. Half that, and Bangladesh is practically gone. Even just 1 m would make half of the country disappear in the dry season and the rest during the monsoon. How will we evacuate 150 million people (present estimate)?