Even the most forgetful person can be happy with a cactus! One shot glass of water ever 2-3 weeks and these guys will thrive and Cacti is very strong in eliminating bacteria. In tackling pollution, cacti is also great at reducing radiation. In addition, cacti absorbs carbon dioxide at night to release oxygen.
Spathiphyllum, also called Peace Lily, acts as a general air cleanser of many environmental pollutants, and will even filter contaminants such as benzene, formaldehyde and trichloroethylene. It cleans best at one plant per 10m2.