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Gerbera daisy (Gerbera jamesonii) – Just like the chrysanthemum, this plant features bright flowers and requires lots of sunlight. It removes both benzene and trichloroethylene.
Mother-in-law's tongueMother-in-law's tongue (Sansevieria trifasciata 'Laurentii') – This hardy plant (at left) filters formaldehyde and doesn’t require a lot of maintenance.
reply to post by qmantoo
Make the air sucked into the house get forced through a trough of water ... the water will filter out most dust and particulate matter ... however it will do nothing for the toxic gasses associated with smog and I have no immediate clues as to how to filter them out in an easy cheap fashion unless you want to construct your own activated carbon gas mask like filters,
Ok, thanks for your thoughts. I suppose anything which has a pump as part of it is going to be fairly noisy too. A fan just wont give the kind of 'suck' which is needed to get the air through the filter fast enough.
To get the smaller particles, it helps to have a filter with an electrostatic component that charges the small particles with an ionizer and causes them to be deposited onto a filter which they would otherwise pass through. I bought a couple of those and they work pretty well (Hunter HEPAtech).
I am sure there are air filters you can buy, but trying to examine the possibility of something simple and relatively cheap. If it is already out there, I have not see people using it here, which is strange.