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                      | Fuel 
                        cell converts waste to power |  
                     
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                                  | Fuel 
                                    cells are a promising technology for generating 
                                    cheap, relatively clean energy. One problem 
                                    is that fuel cells produce carbon monoxide, 
                                    which can gum up the works. This is usually 
                                    dealt with in a step that uses relatively 
                                    expensive heating and cooling equipment. A 
                                    room-temperature method for cleaning up the 
                                    waste product also contributes to energy production. Full 
                                    story
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