According to NASA plants are nature's life support system. In research that will eventually help astronauts reach Mars they have identified plants that will purify air and remove toxins. Some toxins occur in our home from furnishings, aerosols and cleaning products leading to poor air quality that may cause sick building syndrome. Plants can remove these pollutants as they photosynthesise and release pure Oxygen instead. Some plants such as Sansevieria, Dracaena, ferns and ivies are especially good at filtering the air.