An anonymous reader writes: Wired.com reports that scientists at Sandia National Laboratories are creating a prototype of a system that will be able to synthesize methanol and gasoline using sunlight and carbon dioxide: "The Sunlight to Petrol, or S2P, project essentially reverses the combustion process, recovering the building blocks of hydrocarbons. They can then be used to synthesize liquid fuels like methanol or gasoline. Researchers said the technology already works and could help reduce greenhouse-gas emissions, although large-scale implementation could be a decade or more away... Lab experiments have shown that the process works, Stechel said. The researchers hope to finish a prototype by April... The Sandia team envisions a day when CR5s are installed in large numbers at coal-fired power plants. Each of them could reclaim 45 pounds of carbon dioxide from the air daily and produce enough carbon monoxide to make 2.5 gallons of fuel. Coupling the CR5 with CO2 reclamation and sequestration technology, which several scientists already are pursuing, could make liquid hydrocarbons a renewable fuel, Stechel said."