The design concept for the ANDREA air filter, previously dubbed the Bel-Air, was featured on Inhabitat two years ago in its prototype phase. We’re revisiting this savvy innovation since it recently came to fruition and became available for purchase this week. Invented by French designer Mathieu Lehanneur with Harvard professor David Edward, ANDREA transforms household plants into air cleaners which effectively rid indoor air of toxins and pollutants to purify baby’s nursery or any room in the house.