Air pollution is one of the world's invisible killers. It causes seven million premature deaths a year, making it the largest single environmental health risk, according to the World Health Organization. But planting new trees is not always a viable option.That's why the City Tree, a mobile installation which removes pollutants from the air, has been popping up in cities around the world, including Oslo, Paris, Brussels and Hong Kong.
Do you know what a City Tree is? It seems to have the same environmental benefits of a forest. How is it possible? Find it out in this article!