If you're looking for some plants for your own home/office that are capable of removing toxins from the air, here's a good list, originally compiled by NASA: http://en.wikipedia.org/wiki/List_of_air-filtering_plants
http://www.buildingecology.com/articles/critical-review-how-...
The fact that NASA's name is associated with this study has led it to be widely accepted uncritically.
When I lived in Augusta, GA the air around the city would occasionally reek due to a nearby paper mill. The smell would blow over the city after an hour, but anything that slipped into drafty homes would remain for hours; I'd only notice after returning from walking the dogs.
I started to wonder what I was breathing and found a list of possibile offenders: formaldehyde, acetaldehyde, benzene, chloroform, tetrachloroethylene, and trichloroethylene [1]
I was hoping my plants would help (the link nate_meurer posted casts some doubt).