But when they raised the idea of plug-in technology, the union of bus drivers voted against their members plugging in cables on health and safety grounds.

BBC: Wireless charging - the future for electric cars?

And yet, for all its imperfections, the Turtle King was so much more practical than sitting in a stopped taxi or crowding onto a Beijing bus that it had become what all new-energy technology is somehow supposed to be: cheap, simple, and unobtrusive enough so that using it is no longer a matter of sacrifice but one of self-interest.

NEWYORKER: Green Giant

Jim Fletcher, a mechanical engineering doctoral student in fuel cell technology, said the bus is 10 percent more efficient than comparable diesel buses -- a first step in what researchers expect will one day be a far more efficient form of transportation.

CNN: Bus showcases fuel cell technology

Les Warneford, managing director of Stagecoach UK Bus, said the new buses would be "better for the environment and continue our market-leading investment in greener technology".

BBC: Stagecoach to invest ?75m in new buses and coaches

The two exchanges appear to make a good fit: The tech-fuelled Nasdaq, which is the world's largest electronic exchange, is home to technology bellwethers like Dell and Microsoft, while OMX is also technology-driven with the likes of Ericsson and Nokia in its ranks, along with truck and bus-maker Volvo.

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