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Letter: For the record

Published 24 March 2010

• The nominal domestic electricity supply voltage in Europe is at 230 volts, not 240 volts (13 March, p 20).

• It would take 20 Oyster wave-power system to power 9000 homes, not just one Oyster system (6 March, p 18).

Issue no. 2753 published 27 March 2010

New Scientist issue 2753 cover

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