"There have been several studies that examine how house plants can actually help filter and clean the air in our homes. One notable study, by NASA (yes, that NASA), found that common houseplants are a great way to filter and clean the air in small, enclosed spaces. Another study, from 2009, found that indoor plants can remove formaldehyde and other toxins from the environment. In order to get these air-filtering benefits, the NASA study suggests having one 10- to 12-inch potted plant per 100 square foot of room."Eldread must live.