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Last broadcast on Thu, 11 Dec 2008, 13:30 on BBC Radio 4 (see all broadcasts).
Synopsis
Matt Baker finds out about a new project to revive the hydroelectric plant at Grassington in Yorkshire and others like it using a 2,000-year-old invention called Archimedes' Screw.
Broadcasts
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Sat 6 Dec 200806:07
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Thu 11 Dec 200813:30

