http://www.geeksaresexy.net/2012/05/...t-absorbs-co2/

Shamengo pioneer Pierre Calleja has invented something truly remarkable–a light powered by algae that absorbs CO2 in the air–at the rate of 1 ton PER YEAR, or what a tree absorbs over its entire lifetime! The microalgae streetlamp has the potential to provide significantly cleaner air in urban areas and revolutionize the cityscape.
www.youtube.com/watch?v=wuWDex5mh5Y


Quite the...bright...idea.