i grew up being told that spider plants were great for cleaning the air. especially if there is a smoker in the house. i know nothing about it, but since i can remember i have always had a couple spider plants in my home, even now.
the only hard part with this is not all houses are light enough. in cold climates, lots of windows (good light) would lead to lost heat and you would need to use more power, more greenhouse gases, to heat your house (unless your the proactive type and buy a sweater).
i have recently planted a few hundred seeds of various plants, so i guess we only need 999,999,999,700 more
