Is Urbanism Enough to Curb Global Warming?

"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 Penn conference featured many speakers proposing changes, large and small, as to how buildings and cities should be designed. The scientists were hard-nosed and slightly scary. Planning consultants were authoritative and self-assured—as planning consultants tend to be. They described new carbon-neutral cities, with wind farms and solar arrays, green roofs and urban farms, far-ranging mass transit, and large-scale water recycling. The Power Point images were mesmerizing. Most of the projects appear to be in the Gulf states. In the present economy, most are, I suspect, on hold.

"Most of the planners at the Penn conference emphasized technological fixes, but if the point of no return has already been passed in global warming, as some of the scientists at the conference suggested, protective measures are at least as important, not least against the anticipated rise in sea levels."