Plants such as the weeping fig, Areca palm and Philodendron have been shown to reduce airborne pathogens and pollutants such as formaldehyde, bacteria and mold.

According to research from the University of Birmingham and the Royal Horticultural Society, the presence of potted plants can remove up to 20% of nitrogen dioxide - a common pollutant, particularly in areas near busy roads.

Laboratory studies have shown that the potted-plant microcosm is effective at combatting volatile organic compounds.