There is enough heat stored just below the earth's surface to potentially meet the world's energy needs. But can we tap it?<br /><br />Subscribe NOW to The Economist: http://econ.st/1Fsu2Vj<br /><br />Fossil fuels extracted from the ground are the primary resource for much of the world's energy use but they also pollute our environment. <br />A promising new technology called engineered geothermal systems, or EGS, aims to create clean energy by harnessing heat from beneath the earth. <br /><br />Get more The Economist<br />Follow us: https://twitter.com/TheEconomist<br />Like us: https://www.facebook.com/TheEconomist<br />View photos: https://instagram.com/theeconomist/<br /><br />The Economist videos give authoritative insight and opinion on international news, politics, business, finance, science, technology and the connections between them.
