U.N. releases gloomy report on global warming

Scientists say climate change is getting worse and there could be “life-or-death” consequences for our planet in the next 20 years. The new report from the U.N. predicts that at the current warming rate, millions more people will die from extreme heat by the year 2040. New York Times international climate reporter Somini Sengupta joins “CBS This Morning” to discuss the details of the report.