Hydrogen fuel cells could power up to thirty percent of the global car fleet by 2050 and achieve oil saving equivalent to 13% of global oil demand, a new International energy agency (IEA) report has indicated. Together with other low carbon technologies, this could halve global CO2 emissions, it estimates. However, the market will not take off unless trillions of dollars are invested over the next decades, and the cost of fuel cells is reduced ten to fiftyfold. See press release and report summary.
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