Paris tries out the air-cleaning columns

The well-known “Morris columns” in Paris, which have so far been used for advertisement boards, will now also be used as an air-cleaning technology. Thanks to a system developed by the French start-up Fermentalg, microalgae contained in the column will filter CO2 particles, nitrogen oxides and fine dust particles by means of a biochemical reaction. The first column will be installed in the Place d’Alesia, with 72,000 vehicles driving through it on a daily basis.