Sure, houseplants are great. But they're not actually cleaning the air

Houseplants' air-cleaning and oxygen-producing benefits may have been exaggerated, a new study says.

(CNN)You've probably heard people say that keeping plants in your home or office helps to make the air cleaner, but science says otherwise.

There are two primary myths about keeping plants in indoor spaces: one is that you get more oxygen with a houseplant around, and the other is that the plant helps clean the air. Turns out, neither one is true.
A study published this week in the Journal of Exposure Science & Environmental Epidemiology debunked the myths by analyzing 12 studies on the subject over the past 30 years.
"[The studies] would take a potted plant and put it in a small chamber ... three feet by three feet by three feet ... and they would inject a particular volatile organic compound (VOC) into the chamber ... and watch it decay over time, and that decay is what they would contribute to the plant clearing the VOC," Michael Waring, one of the study's authors, told CNN.