in search of fresh air: NASA lists the indoor plants that will naturally clean your spacein 1989, a team at NASA conducted its ‘clean air study’ to investigate the naturally filtering properties of plant life. NASA had conducted the study in response to the ‘sick building syndrome,’ as it came to be known late into 20th century. during that time, fresh air exchange in buildings was sacrificed in favor of reduced energy usage — to lower the cost of heating and cooling a building, inter
