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Entrepreneurs present 'City Trees' to fight air pollution

Berlin-based Green City Solutions has invented the "CityTree", a unique 3 meter tall mobile system which removes pollutants from the air. The company claims its invention has the environmental benefit of up to 275 actual trees. But the CityTree isn't, in fact, a tree at all -- it's a moss culture. Certain moss cultures have the ability to filter pollutants such as particulate matter out of the air by binding them to the leaf surface and then integrating them permanently into their own biomass. This makes them ideal air purifiers. But in cities, where air purification is a great challenge, mosses are barely able to survive due to their need for water and shade.

The installation is autonomous and requires very little maintenance: solar panels provide electricity, while rainwater is collected into a reservoir and then pumped into the soil... Pollution sensors are installed inside the installation, which help monitor the local air quality. The City Trees have been popping up in cities around the world, including Oslo, Paris, Brussels and Hong Kong.



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Insight in Air Quality | Air quality, health and environment: Entrepreneurs present 'City Trees' to fight air pollution
Entrepreneurs present 'City Trees' to fight air pollution
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Insight in Air Quality | Air quality, health and environment
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