House plants are popular for adding charm and beauty to a home, but many homeowners may not know that their favorite potted plant may also be improving the air quality in their house. Surprisingly, studies have shown that even small house plants can significantly improve indoor air quality and even filter out harmful chemicals and allergens. To add color and vibrancy to any room, as well as make the air easier to breathe for everyone in your family, consider inviting inside any of the following popular potted plants: spider plant, daisy, aloe, chrysanthemum, pothos, ivy, philodendron and bamboo. There are, of course, dozens more plants that you can add to your collection. Don't forget to thank your plants for providing this valuable service by fertilizing them during the warmer months, watering them regularly and making sure the pots give their roots plenty of growing room.