Compact IoT green wall cleans urban air

A German startup has devised an Internet of Things green space that is monitored electronically and removes pollution from the urban environment.

We have already seen modular plant pots that create vertical home gardens, and a plant wall that can purify indoor air. Now, a German company is taking things a step further with an innovation they hope will be an answer to creating low-cost, low-maintenance outdoor urban greenscapes. The company has developed a freestanding plant filter, the CityTree, that can clean the surrounding air of particulate matter while offsetting 240 tons of CO2 equivalents per year. The 12-foot-high unit combines a vertically-installed moss culture with vascular plants for a green wall that can ingest particulate matter, nitrogen dioxide and ozone, and has the same cleansing effect as 275 urban trees but at 5 percent of the cost and just 1 percent of the space. Thanks to solar panels and a fully automated provision of water and nutrients using a built-in tank, the CityTree requires only a few hours of maintenance each year, and has a production footprint of just four tons of CO2.

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