Scientists managed to modify pothos ivy plants so that they can remove harmful air pollutants like chloroform and benzene from homes. The researchers added the noxious gases (benzene and chloroform) to modified and non-modified plants in glass tubes. After 11 days they noticed that, compared to the unmodified plants which didn’t affect the concentration of either gas much, the modified plants have decreased the concentration of both gases by almost 80 percent.