6. Aloe Vera

A lot of people already own aloe vera in their homes since it has a great healing ability. But this indoor plant is also excellent when it comes to improving the air quality. In the same study made by NASA, it has been shown that aloe vera removes formaldehyde and benzene, two main VOCs found in a typical house.

The plant was proven to be very effective in constantly filtering out formaldehyde. Even though it’s pretty simple to maintain an aloe vera, don’t worry if you see some brown spots on your plant. This doesn’t mean it will die, but the opposite. Those brown spots are the sign that your aloe vera absorbs a high level of benzene, so the plant acts as a natural air purifier.