hlorophytum (umm, isn’t this a spider plant?) is an air filter itself. Chlorophytum can perform photosynthesis under weak light and absorb harmful air. One pot of Chlorophytum in 200 square foot room is enough to perform as an air filter, which releases oxygen and absorbs carcinogens like formaldehyde and styrene. Chlorophytum is very strong in absorbing carbon monoxide and formaldehyde. It decomposes benzene and nicotine in tobacco as well.