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CityTree a Pollution Solution?

Image: CityTree a Pollution Solution?

A CityTree in Brussels, Belgium (Rex Features via AP Images)

By    |   Wednesday, 28 Jun 2017 06:35 AM

CityTree, a plant-based air filter, could be a pollution solution for many overpopulated areas where air quality has been decreasing, according to founders of a startup that created the structure.

The four founders of Green City Solutions met at Dresden University in 2014 and created the air filter, which they claim has the same impact as 275 trees, but in 99 percent less space, according to The Independent.

A CityTree looks like a large green wall that is actually made up of plants like mosses and lichens with large leaf surfaces to absorb pollution. Air vents speed up the cleansing process and collect data about types and levels of pollution.

"Moss cultures have a much larger leaf surface area than any other plant. That means we can capture more pollutants," Zhengliang Wu, co-founder of Green City Solutions, told CNN. "We also have pollution sensors inside the installation, which help monitor the local air quality and tell us how efficient the tree is."

Green Solutions creators claim that a CityTree can absorb around 250 grams of particulate matter a day and capture greenhouse gases by removing 240 metric tons of CO2 per year.

According to Inhabitat.com, Green Solutions has put up 20 CityTrees in major cities around the world, including Oslo, Paris, Brussels, and Hong Kong.

One of a CityTree’s drawbacks, though, is cost: $25,000.

Also, Wu told Inhabitat.com that Green Solutions has run into concerns from local lawmakers.

"We were installing them (the CityTrees) in Modena, Italy, and everything was planned and arranged, but now the city is hesitant about the places we can install because of security reasons,” said Wu.

King's College London air pollution expert Gary Fuller told CNN that an urban air purifier like CityTree may too ambitious.

"Even if you had a perfect air cleaner, getting the ambient air in contact with it is really hard," said Fuller. "Efforts would be better put into stopping the pollution from forming in the first place, maybe cleaning up a city's bus fleet."


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CityTree, a plant-based air filter, could be a pollution solution for many overpopulated areas where air quality has been decreasing, according to founders of a startup that created the structure.
citytree, pollution, solution
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2017-35-28
Wednesday, 28 Jun 2017 06:35 AM
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