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Electricity that grows on trees – BBC World Service

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Scientists in Italy have discovered that trees generate an electrical charge every time the wind blows strongly enough to make their leaves touch one another.

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The researchers, from the Italian Institute of Technology, have managed to harvest enough energy this way to power 150 LED lights from a single leaf.

People Fixing the World reporter Dan Gordon meets them, and others, who are trying to make use of untapped, natural sources energy. He speaks to people involved in a project trying to produce electricity from the interaction of fresh and salt water where rivers meet the sea.

And a geologist in Iceland, who’s helped dig nearly 5km beneath the surface of the Earth. At that depth, the temperature can be about 600C – the idea is to mine the heat and turn it into energy.

Find more videos about amazing trees here: https://www.youtube.com/playlist?list=PLz_B0PFGIn4eUHeE3WD9gQ9_KEaUtlrQi

Watch more videos on people fixing the world here: https://www.youtube.com/playlist?list=PLz_B0PFGIn4eKeN1PEshORrjrQyL0dCIy

Website: https://www.bbc.co.uk/worldserviceradio
Twitter: https://twitter.com/bbcworldservice
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