On GZERO World, Ian Bremmer speaks with Inger Andersen, Executive Director of the UN Environment Program. Will the UN Climate Conference (COP26) produce lasting change or just more hot air? The world's top 20 economies, Andersen 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 this episode of GZERO World with Ian Bremmer: Surviving a warming planet