Growing plants at home is a great way to clean the air of toxins and mold. That makes the chances of inhaling these poisons smaller. A new study by NASA aimed at domestic plants found out that some plants are better at filtering air than others. Besides toxins, the plants filter the air from dust, paint, building materials and more.

Here are six plants you must have home:

Aloe – this plant raises the oxygen levels at your home, and absorbs carbon monoxide, carbon dioxide and formaldehyde. Just a single aloe plant can do the same work as nine biological air purifiers.

Ficus – a well-known and easily maintained plant. It doesn’t need a lot of light, and cleans the air from formaldehyde great. However, keep it out of reach of kids or pets because its leaves can be poisonous.

Ivy – a popular plant which cleans the air up to 60% from toxins and 58% from particles of feces within six hours after it entering the area.

Spider plant – this plant makes photosynthesis with minimal light. It cleans the air of toxins like formaldehyde, styrene, gasoline and carbon monoxide. Just one spider plant purifies up to 200 square meters’ space.

Snake plant – a plant that is almost indestructible and very resistant. It doesn’t need much light, and also produces oxygen besides removing toxins from the air.

Peace lilies – an excellent air purifier. It filters formaldehyde from the air as well as trichloroethylene.

NASA recommends having between 15 and 18 plants like these in 500 square meters, or 3-4 meters in an 80 square meters’ area. Put one of the plants in the bedroom, so it can produce oxygen overnight.