Scientists are skeptical. Planners are hopeful. The Dutch are pragmatic.
Still from a promotional movie called “Winning with Water” from Innovation Platform.Winning With WaterAccording to Timothy Beatley, an urban-planning professor at the University of Virginia and the author of Green Urbanism, the per-capita carbon dioxide emissions of American cities are almost twice as high as those of their European counterparts. Hardly surprising, since European cities are denser and more compact, homes are smaller, and people rely to a far greater extent on mass transit. So if Americans are to significantly reduce their carbon footprint, we will have to do a lot more than switch to reusable shopping bags and recycle our soda cans. But as a recent conference on "urban design after the age of oil" at the University of Pennsylvania (where I teach) demonstrated, there is something of a disconnect between the global-warming problem and the available solutions.
The problem is easily stated. In 1950, the global emission of carbon dioxide was 6 billion tons a year. Thanks to population growth, urbanization, the expansion of wealth, and massive industrialization around the world, by 2008 this has increased fivefold to 30 billion tons a year. Assuming that nothing is done to reduce emissions, by 2058, they will be 60 billion tons a year. Thus, to reduce global warming, whose effects are already beginning to be felt, it will be necessary to take drastic measures just to stay at the present level, never mind actually making real progress. For example, to reduce the number of coal-fired generating plants, nuclear capacity in the United States will have to be doubled. To reduce car emissions, either Americans will have to drive half as many miles per year or cars will have to be twice as efficient. Buildings will have to use 25 percent less electricity.
See full Article.
Posts
