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CityTree Cleans Up Air by Moss Culture

The high tech CityTree by Green City Solutions cleans up air as effectively as 275 trees. The moss in the installation filters city air of pollutants like nitrogen oxide, ozone and particulate matter. And behind the living layer there's a high-tech, solar powered control and metering system. Nothing will replace the biosphere of real trees, but since the CityTree needs only 1% of the space the 275 trees would take, it's certainly a welcome addition to dense cities.