Plants indoors can do wonders for cleaning the air, especially in cold climates where houses are airtight, sealing in the toxins. But choose your plants carefully, as some plants exhale more carbon dioxide than they absorb. And for outdoor plants being considered as a carbon sink, here's one that's OK:
The attractions of miscanthus stem from its status as a ''C4'' plant, which means it has a highly efficient method of photosynthesis, converting more light and heat into energy than other plants. The only other C4 plant commercially grown here is forage maize. Miscanthus flourishes with a low fertiliser input, and is suited to northern Europe. It is also carbon neutral, extracting as much carbon dioxide during growth as is expelled when it is burnt.
- Crispin Aubrey, "From sewage sludge to giant grass," The Independent (London, England), July 20, 1992 [Quoted from http://www.wordspy.com/words/carbonneutral.asp]
