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02:15
From:
earthrise
How It Works: Geothermal Electricity
How can disused oil wells and operating oil fields generate green electricity?
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By
Earthrise
8 Aug 2013
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![Raul Castro led Cuba's army, then succeeded his brother Fidel as president of the country, then first secretary of the Communist Party [File: Alejandro Ernesto/Pool/Reuters]](/wp-content/uploads/2021/04/2014-01-02T120000Z_505579105_GM1EA120SSZ01_RTRMADP_3_CUBA.jpg?resize=170%2C113)
![Doge’s surge, boosted by the likes of Elon Musk and Mark Cuban, is part of a rise in altcoins, a term for all the digital tokens that have sprung up in imitation of bitcoin [File: Yuriko Nakao/Getty Images]](/wp-content/uploads/2021/02/367892651.jpg?resize=170%2C113)
![The Philippine Coast Guard reported on Thursday that despite repeated demands by Manila that Chinese ships leave Whitsun Reef, at least 240 Chinese vessels remain in the area and surrounding waters as recently as Wednesday [Philippine Coast Guard]](/wp-content/uploads/2021/04/Ey_hP4jVEAMl3lu.jpg?resize=170%2C113)
