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A world tour to discover the most innovative solutions in green energy. We discover thermal plants combining wind and hydraulic energy in Madeira; citizens who own wind turbines on the Danish island of Samso; geothermal energy in Iceland; technologies exploiting the movements of waves and tides on the Scottish island of Orkney. Experts insist that the fight against climate change requires a real energy transition. However, renewable energies continue to spark debate, with their detractors accusing them of a high cost for uncertain efficiency. Contrary to these criticisms, researchers, entrepreneurs and committed citizens are mobilizing to impose green energy, particularly in Madeira, where diesel thermal plants have given way to a mix combining wind and hydraulic energy. On the Danish island of Samso, citizens own the wind turbines, which provide them with income in addition to electricity, while in Iceland geothermal energy is proving so efficient and cheap that it is now encouraging companies to set up there. Finally, at the European Marine Energy Centre on the Scottish island of Orkney, researchers are developing promising technologies that exploit the movements of waves and tides. Documentary series (Germany, 2020, 44 mins) Rebroadcast available until 04/09/2026 #ecology #arte #energy Subscribe to the ARTE channel / @arte Follow us on social media! Facebook: / artetv Twitter: / artefr Instagram: / artefr