clipped from: factoidz.com   
These are the top 25 plants listed in order of their ability to remove the most toxins and poisonous gases:

Corn plant (Dracaena massangeana)

Dumb cane (Camilla)

Dumb cane (Exotica)

Peace lily

Peach lily

Warneckei

Dendrobium orchid

Gerbera daisy

King of hearts

Lady Jane

Weeping fig

Areca palm

Azalea

Bamboo palm

Dragon tree

Dwarf date palm

English ivy

Florist’s mum

Janet Craig

Kimberly queen fern

Lady palm

Lily turf

Parlor palm

Peacock plant

Tulip