May be a power source for the future:
ScienceDaily (Mar. 28, 2011) — Scientists have claimed one of the milestones in the drive for sustainable energy -- development of the first practical artificial leaf. Speaking in Anaheim, California at the 241st National Meeting of the American Chemical Society, they described an advanced solar cell the size of a poker card that mimics the process, called photosynthesis, that green plants use to convert sunlight and water into energy.
http://www.sciencedaily.com/releases...0327191042.htm