Sadly (and strangely) enough, the air we all breath is often more polluted indoors than out -- so air purifiers and filtration systems are becoming big business. The Bel-Air filtration system borrows technology from NASA to take things to a greener level (literally) by using plants and nature to filter and purify the air through natural processes. There are 3 ways the filter works to purify the air of chemicals like benzene, formaldehyde and trichloroethylene: through the leaves of the plants, the roots of the plants, and through a humid bath. Plus it looks cool!

Unfortunately right now the Bel-Air is only a prototype, but it's expected to go on sale as early as 2009.

http://gizmodo.com/gadgets/eco/bel+air-filtration-system-uses-plants-to-purify-our-environs-328342.php

 http://www.greenrevolution2.com

Its a true fact that air purifiers and filteration systems are becoming big businesses. Even in a IC engine, air filteration plays a major role in fuel efficiency. The Bel-Air filteration systems seems to be a very viable solution for going green but also the price is a very major criteria. Hope that it goes on sale for a fair price so that it becomes affordable and we can have a clean and green environment.