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Focus visits a Norwegian fjord where autonomous 'robot' ships sail on batteries. The program also travels to Tananger on a cargo ship with so-called rotor sails, sails consisting of rotating cylinders that convert wind energy into propulsion. Maritime scientists talk about these and other technological developments that can contribute to cleaner shipping. On ntr.nl/wetenschap you will find the best science stories from the NTR. We follow the developments in science with a critical eye and keep you informed of the latest science news, new programs and fun facts. Follow us on Twitter: / wetenschap Follow us on Facebook: / ntrwetenschap Follow us on Instagram: / ntrwetenschap