Will world leaders accomplish anything meaningful during climate change talks in Madrid?

Environmental experts, global leaders, and activists from all over the world are gathering in Madrid for the U.N. Climate Change Conference. That includes Swedish 16-year-old activist Greta Thunberg, who just docked after a three-week boat trip across the Atlantic in her carbon-neutral sailboat. The mood is heavy after a U.N. report last week said emissions are increasing, and we’re not moving fast enough to curb that.