Eco factor: Black cabs powered by hydrogen fuel cells for London. Intelligent Energy along with a consortium of companies including Lotus Engineering has unveiled a fuel cell powered black cab, a fleet of which is expected to be on the roads of London in 2012. The project is a part of plans to make the capital’s taxis tailpipe emissions free by 2020. The prototype is powered by hydrogen fuel cells and

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London’s black cabs go green with hydrogen fuel cells