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15 houseplants for improving indoor air quality

By: Julie Knapp on March 1, 2010, 11:50 a.m.
English ivy (Hedera helix)

Photo: gorgeoux/Flickr

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English ivy (Hedera helix)

A study found that the plant reduces airborne fecal-matter particles. It has also been shown to filter out formaldehyde found in some household cleaning products.