Chicago has named a two-mile section of West Cermak Road "the greenest street in America" for its sustainability features, writes Randy Woods. The permeable pavement has "smog-eating cement" technology, which could help reduce air pollution. Bioswales on the sides with drought-resistant plantings are expected to reduce stormwater runoff by up to 80%, and solar panels and windmills power the street lights. The project cost 21% less than similar projects using traditional paving, according to the city's Office of Environment and Sustainability, and should require less maintenance.

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