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Here is what science and tradition actually say about some widely celebrated houseplants.
If You Have a Snake Plant (Sansevieria)
The claim: “…then you have cleaner air!”
The reality: Research from NASA’s Clean Air Study did find that snake plants can remove trace amounts of certain indoor pollutants, such as formaldehyde and benzene. However, the study was conducted in sealed laboratory chambers, not typical homes. To achieve air-purifying effects comparable to a mechanical air filter, you would need an impractical number of plants—estimates suggest more than ten per square foot.
The balanced take: While a single snake plant will not transform your indoor air quality, it is undeniably low-maintenance, resilient, and visually striking. Its presence adds greenery, which studies show can support mood and reduce stress. That is a meaningful benefit, even without the superlatives.
