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Solar lasers, ocean power and volcanoes: unusual energy sources of the future
Arion McNicoll, for CNN
5:10 AM EST, Wed November 13, 2013
Energy from... —
From volcanoes to wave power and even algae, researchers are looking far and wide for viable energy alternatives to power the planet after oil, gas and coal reserves run out. We take a look through some of the more interesting, promising and downright unusual possible energy sources of the future. Gallery by Matthew Ponsford