But as long as they’re not all a city’s doing, a prominent, striking eco-friendly structure such as the San Francisco Federal Building or the green roof on Chicago’s city hall provides a very visible symbol of green intentions and draws attention … and the city council of Marburg, Germany, are heroes in their own right for cleaning up their cities’ sewer systems, promoting wind power and biodiesel , and making solar installations…

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The Green Changemakers: 10 Things that Make a Great Green City

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