How can we go from "fine words" to "fine deeds" at the upcoming COP26 climate summit in Glasgow? For Inger Andersen, head of the UN Environment Program, it's actually quite simple. The world's top 20 economies, she says, are responsible for over three-quarters of global carbon emissions, so if they "make the requisite shifts, frankly we are out of the climate crisis." Watch her interview with Ian Bremmer on the upcoming episode of GZERO World.