Gerald Butts, Vice Chairman & Senior Advisor of Eurasia Group, discusses reasons the rapid global response to climate change warrants optimism on UNGA In 60 Seconds.

There's a lot of doom and gloom out there about climate change. Can you give me a reason to be optimistic?

I'm going to say something you don't hear set very often when it comes to climate change. You should be an optimist. You should be a skeptical optimist, but an optimist nonetheless. Let me explain what I mean. We are scaling up climate solutions faster than even the most ardent among us thought possible a decade ago. Consider this. In 2010, about half of US electricity was generated from coal. This year less than 20% will be, and it's trending towards zero at increasing velocity.