All plants release oxygen through photosynthesis, but some special species may have built-in air-filtering systems, too. A famous 1989 NASA study found that several common houseplants may actually remove carcinogenic chemicals like benzene and formaldehyde from the air in a controlled lab setting.

While subsequent research found inconclusive results about their effectiveness in actual homes, some scientists and gardeners believe having more plants around can also reduce stress and boost your mood.

Either way, there’s no denying the fact your living room could use a little spruce-up. Here are seven top picks for creating your indoor garden.

Boston Fern

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