Reuters: The dream of smog-free cities served by whispering fleets of zero-emission cars is still decades away from becoming reality. Internal combustion engines have established such a stranglehold on the automotive industry that they will probably outlast everyone alive today. Only limited numbers of non-polluting cars that run on hydrogen-powered fuel cells or that burn hydrogen rather than petrol or diesel are on the road, and even their most vociferous supporters say they will ...
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