General Motors announced that it would take a 20 percent stake in a California company that has found a way to triple the driving range of hydrogen-based fuel-cell vehicles to 500 miles. Larry Burns, GM vice president for research and development, said, “Getting up into this kind of range is really the holy grail we were looking for, so it’s pretty exciting.” GM has said it wants to become the first automaker to sell 1 million fuel-cell cars. It is also working with Toyota and ExxonMobil on fuel-cell research.
