Scientists now say that ice melt in Greenland and Antarctica could speed up faster than we previously thought. But that's not just going to raise sea levels - it could drive storms stronger than anything humans have ever seen.
Ted Scambos, Lead Scientist at the National Snow and Ice Data Center, weighs in on the latest study showing increased vulnerability of the Antarctic ice sheet to collapse.
U.S. Secretary of State John Kerry delivers keynote remarks at the Bloomberg New Energy Finance "Future of Energy" Summit in New York City on April 5, 2016.
Mr. Robock says a full-scale nuclear war between the United States and Russia would produce so much smoke that temperatures would get below freezing even in the summertime, crops would die and there would be no food for the entire planet.
