California reached its goal of reducing emissions to 1990 levels four years ahead of the 2020 target date. Robert Epstein, co-founder of Environmental Entrepreneurs, takes a look at what is and is not working as we plan for an additional 40% reduction by 2030. He also examines California's role in reducing worldwide emissions in both developing and developed countries. Series: "Public Policy and Society" [Public Affairs] [Science] [Show ID: 34463]