Former US Vice President Al Gore is known to many as the Paul Revere of climate change, alerting the world to the dangers of a warming planet and other "inconvenient truths" at a time when only 2/5 Americans were onboard with his message. It earned him a Nobel Peace Prize.

But today, Al Gore has good news to share. In a wide-ranging interview with Ian Bremmer on the sidelines of the World Economic Forum in Davos, Gore is clear-eyed but optimistic about our climate future.