Jaime Lerner's Ideas Go Global

"Next year marks the 35th anniversary of a simple but transformative idea in urban planning and transportation: Curitiba, Brazil launched a surface bus system that behaves like a subway. Better than, in some ways. Double-articulated vehicles carry large volumes of commuters, passengers prepay their fare in glazed boarding tubes, designated lanes keep traffic flowing smoothly, and one bus trails the next by one minutes' distance. Curitiba's transit system was established with little municipal investment and at a fraction of the cost of subterranean excavation, and today it carries some 2 million people per day."

Metropolis: "In many respects, the world has caught up to your common-sense approach to sustainability. What events inspired you to embrace those values so early on?"

Jaime Lerner: "It was logic. We realized that sustainability is a whole discussion. Most people think that sustainability is just green buildings. That's very important, but it's not enough. Or that sustainability is new materials, new sources of energy, or recycling, but that's enough, either. When you see that cities are responsible for 75 percent of all carbon emissions, then it's in cities where we can find a more effective answer. It's at the very conception of cities where we have to do this work."

Metropolis: "What is a more ideal plan for battling climate change at an urban scale?"

Jaime Lerner: "One step is to use your car less. Cities will have to provide an alternative public transit. The second is separating garbage, because you can save a lot of energy, even your own. The third is to live closer to work, or to work closer to home. And this is the key issue, because our cities have more and more separation."