Electrical drive trains are displacing mechanical ones in factories, ships, hybrid cars and all the other heavy-lifting sectors of the economy.

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"He can't drive the trains or fly the planes either, " notes Alexis Dormandy, Virgin.com's chief operating officer.

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And in case that seems to leave brawny manual labourers still sunk in tears, isn't it these same men who drive the trains, fight the fires and hold society in thrall to their skill at mending motors and fixing the plumbing?

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Trains drive themselves between downtown and suburbia, homes keep comfortably cool and airy on their own, diagnostic machines perform check-ups and prescribe remedies.

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It trains African health workers to drive safely on difficult terrain and teaches them how to carry out simple maintenance checks on their vehicles on a daily basis.

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Yes, they have trains departing every few minutes, but half empty, and do Germans really need five different Autobahns to drive from Munich to Frankfurt?

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