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A machine used to unload coal from a barge, docked at the Torrevaldaliga Nord power station's jetty, prepares to begin its work supplying the power station with coal. The power station is said to be the world's least polluting coal-fired power station. It is one of the most innovative and modern plants in the world, emitting less greenhouse gas than other coal-fired stations, as well as the oil-fired plant it was converted from. ..