In an interview for GZERO World on the eve of the first virtual UN General Assembly, UN Secretary-General António Guterres offers an optimistic view of renewed commitment to climate action, particularly from the European Union. But he tells Ian Bremmer that it will take much more from the world's biggest carbon emitters—including China, India, and the US—to alter the course of climate change. Guterres also discusses the need for public-private partnerships and the role big corporations and financial institutions play in eradicating the damage of carbon emissions.

Watch the episode: UN Secretary-General António Guterres: Why we still need the United Nations