This urban tree cleans as much polluted air as an entire forest

Air pollution might be invisible, but it results in 7 million premature deaths each year, according to the World Health Organization (WHO). To scrub the air of harmful particulates, “CityTree” installations have been placed in locations such as Oslo, Paris, Brussels and Hong Kong. In addition to being aesthetically pleasing, the invention is said to have the same environmental impact as 275 urban trees.

Developed by Berlin-based Green City Solutions, the CityTree is under 4 meters…

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