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GM RAISES FUEL CELL VOLUMETRIC EFFICIENCY STANDARD BY 60 PERCENT

The relative obscurity of the race to improve power density in a fuel cell stack doesn't mean it's not important, since that's one of the keys to the future of our most promising alternative propulsion systems. So GM's announcement that it has raised the industry's volumetric efficiency standard by some 60 percent is of more than passing interest, even though it's still a long way from where it needs to be for real-world consumer use.