Spider Plant

 
The spider plant is considered among the easiest air-purifying plants to grow. It is effective in removing harmful chemicals from the air, such as carbon monoxide, xylene, formaldehyde and toluene.
Spider plant is native to tropical Africa, so in most of the U.S. it's grown as a houseplant, but you can place it outdoors, out of direct sun, during the summer months. Just be sure to bring it back inside before the temperature drops enough to damage the plant.