You generally want one house plant that is really good at filtering air for ever 100 square feet of area. Some are way better than others at cleaning the air and removing carcinogens.
After conducting the study, NASA and ALCA came up with a list of the most effective plants for treating indoor air pollution.
Heres a list of the found top plants to look for. Keep in mind hat these are readily available at nurseries and stores like Home Depot or Lowes.
1. Philodendron scandens `oxycardium', heartleaf philodendron
2. Philodendron domesticum, elephant ear philodendron
3. Dracaena fragrans `Massangeana', cornstalk dracaena
4. Hedera helix, English ivy
5. Chlorophytum comosum, spider plant
6. Dracaena deremensis `Janet Craig', Janet Craig dracaena
7. Dracaena deremensis `Warneckii', Warneck dracaena
8. Ficus benjamina, weeping fig
9. Epipiremnum aureum, golden pothos
10. Spathiphyllum `Mauna Loa', peace lily
11. Philodendron selloum, selloum philodendron
12. Aglaonema modestum, Chinese evergreen
13. Chamaedorea sefritzii, bamboo or reed palm
14. Sansevieria trifasciata, snake plant
15. Dracaena marginata , red-edged dracaena
In general Ficus, Palms, Lillies, and Spider plants tend to be on many of the top lists.
As vaguely mentioned above some are better at different tasks than others:
Top three oxygen producing plants:#1 Sprouts!: If you grow your own sprouts for food (especially sweet pea sprouts, buckwheat sprouts and sunflower sprouts) you will have a fantastic mini greenhouse effect in your living space. You also get supplemental oxygen orally by eating raw, living greens!
#2 Snake Plant a.k.a. Mother-In-Law’s Tongue: Of all the different oxygen producing plants, this one is unique since it converts a lot of CO2 (carbon dioxide) to O2 (oxygen) at night, making it ideal to have several in your bedroom. 6-8 waist high plants are needed per person to survive if there is no air flow (meaning you could live in a completely air sealed room if you had these plants and the Areca Palms present). The snake plant also removes formaldehyde from the air.#3 Areca Palm: This plant removes xylene and toluene from the air, but also happens to convert a lot of CO2 (carbon dioxide) to O2 (oxygen) during the daytime. Having four (shoulder high plants) of these per person in your household provides enough oxygen to survive on during daylight hours! They need to have dust and grime wiped off of their leaves once a week, or as often as daily if you live in a city with very bad air quality such as Delhi.
Top three air cleaning plants:#1 Madagascar Dragon Tree a.k.a. Red Edged Dracaena: As a popular house plant that needs little attention, it best removes benzene, formaldehyde, xylene and toluene from the air. It cannot tolerate direct sunlight yet it does well in fairly well indirectly lit areas. It is more susceptible to becoming damaged from over watering than infrequent watering.#2 Warneck Dracaena: One of the most popular clean air plants, this one removes benzene, trichloroethylene, xylene and toluene from the air.
#3 Peace Lily (pictured to the right): This species (of which there are a variety of sub-species) thrives best in the shade and with only roughly one watering per week (must be chlorine free water) but never let the soil completely dry out. This easy to take care of house plant removes benzene, formaldehyde, acetone, amonia and trichloroethylene from the air. It also periodically flowers!
Throw an air purifier in each room and you've got a beautiful, oxegenated, dust eliminating SUPER CLIMATE!
Below is a link to a list of 20 other air purifying plants! ENJOY!