If per capita carbon emissions in both China and India rise to U.S. per capita levels, then global carbon emissions will increase by 139 percent. If their emissions stop at French levels, global emissions will rise by only 30 percent. Driving and urbanization patterns in these countries may well be the most important environmental issues of the twenty-first century.Glaeser, Edward (2011). Triumph of the City: How Our Greatest Invention Makes Us Richer, Smarter, Greener, Healthier, and Happier (Kindle Locations 298-301). The Penguin Press. Kindle Edition.