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15 houseplants for improving indoor air quality

March 1, 2010, 11:50 a.m.
Heartleaf philodendron (Philodendron oxycardium, syn. Philodendron cordatum)

Photo: crowstoburnaby/Flickr

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Heart leaf philodendron (Philodendron oxycardium)

This climbing vine plant isn’t a good option if you have kids or pets — it's toxic when eaten, but it's a workhorse for removing all kinds of VOCs. Philodendrons are particularly good at battling formaldehyde from sources like particleboard.