The latest estimates are that by 2050, 70 percent of the world’s population will live in urban areas. Already, 21 mega-cities have populations of 10 to 20 million. I’ll go out on a limb and say we’re going to need some pretty innovative thinking about urban life over the next decade if we’re going to keep cities liveable. One person who’s been giving this a lot of thought is Alex Steffen. He’s the author of Worldchanging: A User’s Guide For the 21st Century, which was updated last year. He’s also been called a futurist and he is, but in a practical way. Steffen’s very big, for instance, on the growth of a culture within cities where people share instead of own, whether it’s cars, sports equipment or power drills. He also knows that it’s going to take a lot more than putting plants and trees on rooftops to make cities sustainable and keep them from, as he puts it, “stealing the future.”
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