6 AIR PURIFYING HOUSE PLANTS. 1. Bamboo Palm...acts as a natural humidifier. 2. Snake Plant...absorbs nitrogen oxides. 3. Areca Palm...1 of the best air purifying plants. 4. Spider Plant...removes carbon monoxide and other toxins. 5. Peace Lily...could be called the “clean-all.” 6. Gerbera Daisy...not only do these gorgeous flowers remove benzene from the air, they’re known to improve sleep by absorbing carbon dioxide and giving off more oxygen overnite.