Green Plants, Clean Air

Houseplants help brighten up a home, but did you know they also act as an air filter? Some plants can remove toxins such as formaldehyde, carbon monoxide and benzene from the air. But the areas each plant can filter is small -- about 12 square feet -- so you may need many plants to effectively clean your home or office. Beneficial plants include aloe vera, elephant ears, philodendrons, English ivy and ficuses, according to a NASA study.