What a reverse in US climate policy means for the rest of the world

On his first day in office, President Donald Trump signed an executive order that started the yearlong process to withdraw the US from the Paris climate agreement. Climate change is a key issue at the Davos World Economic Forum. From Davos, Johan Rockstrom, director of the Potsdam Institute for Climate Impact Research tells The World's Carolyn Beeler that although the Paris pact is unlikely to collapse this remains a very delicate moment."