These five tropical plants can absorb carbon dioxide and air particles while also releasing oxygen, helping to make your home’s air cleaner: 1) Boston Ferns – clean the air of formaldehyde and xylene, and act as natural humidifiers, restoring moisture in the air. 2) Spider Plants – help remove carbon monoxide and other toxins from the air, including formaldehyde. 3) Golden Pothos – great for general indoor air quality improvement. 4) Snake Plants – are effective at absorbing nitrogen oxides and formaldehyde, and release oxygen at night. 5) Areca Palms – filter xylene and toluene from the air, and act as natural humidifiers.