If you attended elementary school science class, you probably remember that plants take in carbon dioxide and release oxygen in a process called photosynthesis. This is how they make their food. It is also a proven method for how to improve air quality in the home naturally.
NASA conducted a study that found that when low-light requiring houseplants were placed in small spaces, they were able to reduce the amount of harmful gases in the air. The same research also found that "activated carbon filters containing fans have the capacity for rapidly filtering large volumes of polluted air and should be considered an integral part of any plan using houseplants for solving indoor air pollution problems."
It is important to note that this study was done in a closed, limited environment, which most of us do not live in. This means that you should not expect a few plants to purify all the air in your home, but they can help you breathe a little easier in a small office space or bedroom that is more enclosed.
Need to Know
Some of the top performing houseplants in the study were gerbera daisies, bamboo palms, peace lilies, pot mums, marginata, and Janet Craigs.