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A snake plant is one of various plants considered ideal to clean indoor air, perhaps even the "best" indoor plant for removing air impurities because it is such a hardy plant indoors. Various studies, including one from NASA (Wolverton, Johnson and Bounds 1989), showed this plant’s ability to remove toxins such as benzene and formaldehyde from the air of a small room or indoor space. However, later studies (e.g. Kays 2009) are less optimistic about the ability of a plant alone to fix indoor air toxins, due to the many constant ebbs and flows of air from outside. Also, potting soil microorganisms play a part, not just the plant. Beyond a small room, you'd need more than 1 plant to cover the whole house and a standard home might require 10 to 20 plants to achieve real benefits––a bit of a forest!

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