Whilst we all look to satellites, cable, low-powered mobile etc, to deliver broadcasting, there's still room in radio for big masts - and they don't come much bigger or more power hungry that those at the BBC's World Service transmission site on Ascension Island in the South Atlantic.
Now they're being powered by a new hybrid wind/diesel power station, supported by five wind turbines. The installation's predicted to save the corporation £0.5m a year on the amount of diesel required. The diesel costs are inflated by the cost of shipping it to the island every 18 months - so they've also invested £3.3 million in a new oil tank.
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