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The NASA Clean Air Study has been led by the National Aeronautics and Space Administration (NASA) in association with the Associated Landscape Contractors of America (ALCA). Its results suggest that certain common indoor plants may provide a natural way of removing toxic agents such as benzene, formaldehyde and trichloroethylene from the air, helping neutralize the effects of sick building syndrome.
- ^ BC Wolverton, WL Douglas, K Bounds (July 1989). A study of interior landscape plants for indoor air pollution abatement (Report). NASA. NASA-TM-108061. http://archive.org/details/nasa_techdoc_19930072988.