The Economist. Dirt cheap organic solar cells about to take off. This is one more step towards a hydrogen economy. Excess energy from solar cells on the roof of a home could be stored as hydrogen through simple electrolysis (as an adjunct to hydrogen extraction from natural gas). This eliminates the need for expensive and bulky batteries. Additionally, this hydrogen could then be used to power power-plant fuel cells for use in the home or cars. Refuel your car at home! Good-bye OPEC. Hello decentralized energy. [John Robb's Radio Weblog]