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Urban Vegetation Cleans Air Better Than Previously Thought


A new finding from Dr. Thomas Pugh, at the Karlsruhe Institute of Technology (KIT) in Germany, reveals the fact that city vegetation does more good than thought before.

“Green areas may be grown road by road without expensive or big initiatives,” says Pugh. He also says that green plants filter nitrogen oxide (NO2) and fine dust (microscopic) from the air, both of which are among the greatest sources of pollution and health problems in big cities, having more than one million victims yearly.

Buildings covered with green vegetation such as grass, ivy or other plants filter this pollution 10 times better than it was thought possible. This was determined through computer simulations of the air enclosed between glass and concrete buildings and the chemical reactions that influence the pollutant air concentration.

Among all of the possible approaches to plant green plants in cities, green walls produced the best results, while roadside trees were only gathering the pollution at lower heights.

[via phys.org]

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