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Home / Articles / Boulderganic / Environment Today /  Green walls: How leaf-covered buildings can reduce pollution
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Tuesday, March 26,2013

Green walls: How leaf-covered buildings can reduce pollution

Photo courtesy of Shutterstock.com
Vertical garden

While much attention has been given to reducing air pollution and exhaust from cars, a new concept is taking hold in Paris, Frankfurt, Madrid and other cities across Europe: green walls.

The design calls for leafy vegetation fixed to the outside of a building. The benefits are many: It keeps "street canyons," streets and sidewalks between tall buildings, cool; it reduces nitrogen dioxide and particulate pollution in the air; and it takes advantage of the "more underutilized spaces in our urban areas," Paul Erlichman of a Toronto environmental design group.

The design also recycles water by collecting it at the bottom and returning it to the top.

See the story and photos at National Geographic.

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