<P> The first list of air - filtering plants was compiled by NASA as part of a clean air study published in 1989, which researched ways to clean air in space stations . As well as absorbing carbon dioxide and releasing oxygen, as all plants do, these plants also eliminate significant amounts of benzene, formaldehyde and trichloroethylene . The second and third lists are from B.C. Wolverton's book and paper and focus on removal of specific chemicals . </P> <P> NASA researchers suggest efficient air cleaning is accomplished with at least one plant per 100 square feet of home or office space . Other more recent research has shown that micro-organisms in the potting mix (soil) of a potted plant remove benzene from the air, and that some plant species also contribute to removing benzene . </P> <Table> <Tr> <Th> Plant, removes: </Th> <Th> benzene </Th> <Th> Total μg / h of benzene removed </Th> <Th> formaldehyde </Th> <Th> Total μg / h of formaldehyde removed </Th> <Th> trichloroethylene </Th> <Th> Total μg / h of trichloroethylene removed </Th> <Th> xylene and toluene </Th> <Th> ammonia </Th> <Th> Toxic to dogs, cats </Th> </Tr> <Tr> <Td> Dwarf date palm (Phoenix roebelenii) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 1,385 </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Areca palm (Dypsis lutescens) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Boston fern (Nephrolepis exaltata' Bostoniensis') </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 1,863 </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Kimberley queen fern (Nephrolepis obliterata) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 1,328 </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> English ivy (Hedera helix) </Td> <Td> Yes </Td> <Td> 579 </Td> <Td> Yes </Td> <Td> 402 - 1,120 </Td> <Td> Yes </Td> <Td> 298 </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Spider plant (Chlorophytum comosum) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 560 </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Devil's ivy, Pothos plant (Epipremnum aureum) </Td> <Td> Yes </Td> <Td> </Td> <Td> Yes </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Peace lily (Spathiphyllum' Mauna Loa') </Td> <Td> Yes </Td> <Td> 1,725 </Td> <Td> Yes </Td> <Td> 674 </Td> <Td> Yes </Td> <Td> 1,128 </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Flamingo lily (Anthurium andraeanum) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Chinese evergreen (Aglaonema modestum) </Td> <Td> Yes </Td> <Td> 604 </Td> <Td> Yes </Td> <Td> 183 </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Bamboo palm (Chamaedorea seifrizii) </Td> <Td> Yes </Td> <Td> 1,420 </Td> <Td> Yes </Td> <Td> 3,196 </Td> <Td> Yes </Td> <Td> 688 </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Variegated snake plant, mother - in - law's tongue (Sansevieria trifasciata' Laurentii') </Td> <Td> Yes </Td> <Td> 1196 </Td> <Td> Yes </Td> <Td> 1,304 </Td> <Td> Yes </Td> <Td> 405 </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Heartleaf philodendron (Philodendron cordatum) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 353 </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Selloum philodendron (Philodendron bipinnatifidum) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 361 </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Elephant ear philodendron (Philodendron domesticum) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 416 </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Red - edged dracaena (Dracaena marginata) </Td> <Td> Yes </Td> <Td> 1,264 </Td> <Td> Yes </Td> <Td> 853 </Td> <Td> Yes </Td> <Td> 1,137 </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Cornstalk dracaena (Dracaena fragrans' Massangeana') </Td> <Td> Yes </Td> <Td> </Td> <Td> Yes </Td> <Td> 938 </Td> <Td> Yes </Td> <Td> 421 </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Weeping fig (Ficus benjamina) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 940 </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Barberton daisy (Gerbera jamesonii) </Td> <Td> Yes </Td> <Td> 4,486 </Td> <Td> Yes </Td> <Td> </Td> <Td> Yes </Td> <Td> 1,622 </Td> <Td> No </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Florist's chrysanthemum (Chrysanthemum morifolium) </Td> <Td> Yes </Td> <Td> 3,205 </Td> <Td> Yes </Td> <Td> 1,450 </Td> <Td> Yes </Td> <Td> </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Rubber plant (Ficus elastica) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Dendrobium orchids (Dendrobium spp .) </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Dumb canes (Dieffenbachia spp .) </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> King of hearts (Homalomena wallisii) </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Moth orchids (Phalaenopsis spp .) </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> <Tr> <Td> Aloe vera (Aloe vera) </Td> <Td> Yes </Td> <Td> </Td> <Td> Yes </Td> <Td> 65 </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Janet Craig (Dracaena deremensis "Janet Craig") </Td> <Td> Yes </Td> <Td> 1,082 </Td> <Td> Yes </Td> <Td> 1,361 - 2,037 </Td> <Td> Yes </Td> <Td> 764 </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Warneckei (Dracaena deremensis "Warneckei") </Td> <Td> Yes </Td> <Td> 1,630 </Td> <Td> Yes </Td> <Td> 760 </Td> <Td> Yes </Td> <Td> 573 </Td> <Td> No </Td> <Td> No </Td> <Td> toxic </Td> </Tr> <Tr> <Td> Banana (Musa Oriana) </Td> <Td> No </Td> <Td> </Td> <Td> Yes </Td> <Td> 488 </Td> <Td> No </Td> <Td> </Td> <Td> No </Td> <Td> No </Td> <Td> non-toxic </Td> </Tr> </Table> <Tr> <Th> Plant, removes: </Th> <Th> benzene </Th> <Th> Total μg / h of benzene removed </Th> <Th> formaldehyde </Th> <Th> Total μg / h of formaldehyde removed </Th> <Th> trichloroethylene </Th> <Th> Total μg / h of trichloroethylene removed </Th> <Th> xylene and toluene </Th> <Th> ammonia </Th> <Th> Toxic to dogs, cats </Th> </Tr>

Nasa’s list of 50 indoor plants that clean the air
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