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Solar-panel skyscrapers, rooftop gardens, towering wind turbines—the green future is here, and it's all about going vertical. In progressive cities around the world, sci-fi visions of a future populated by shiny high-rise buildings where plants grow far above the soil turn out to be not so far-fetched. Indeed, from Singapore to Chicago, the smart money is on reducing sprawl, harnessing the wind and sun, and greening the urban atmosphere. And like locals, smart travelers are making the most of the high quality of life that comes with eco-friendly improvements such as gorgeous city parks and gardens, organic restaurants and microbreweries, and stunning new architecture. So say good-bye to your car, jump on a speedy tram or bike, and get ready to see green cities in a whole new way.
Published September 2011. Pictured: Portland, Oregon.