Filling your house with potted plants might make you happier and more productive, but it’s not going to make the air you breathe any cleaner, wrote Carly Cassella in ScienceAlert. A critical review, drawing on 30 years of research, has once found that houseplants have little – if any – real value as air purifiers.
Shocking news indeed. But how come then that is has been advocated for three decades? It all started in 1989 with a now famous NASA study. Houseplants were placed in a small sealed chamber to discover if they could reduce the levels of volatile organic compounds (VOCs) likely to be polluting space stations. They could and did, according to NASA cognoscenti.
However, a small sealed chamber is very different from an entire home or office environment. An extensive review by a pair of researchers in the Journal of Exposure Science & Environmental Epidemiology effectively refutes the NASA findings, and virtually all those since, that suggested houseplants assure us of clean indoor air.
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