2 years after 195 countries came together under the Paris Agreement to combat the effects of climate change, leading climate economist Nicholas Stern remains cautiously optimistic. In his landmark report on the impact of climate change published in 2006, Stern warned that the cost of inaction would be far greater for future generations than the costs of actions taken to reduce carbon emissions. In this podcast, Stern says while the world "passed the test" when signing the Paris Agreement, he worries that policy makers will not act quickly enough. Stern joined a panel discussion on the economic and financial issues related to climate change at the IMF World-Bank Annual meetings.

Nicholas Stern, Professor of Economics and Government at the London School of Economics, and Chairman of its Grantham Research Institute on Climate Change and the Environment.