| http://www.w3.org/ns/prov#value | - The Guardian reports: The Liberal Democrat leader, Sir Menzies Campbell, and the party's environment spokesman, Chris Huhne, unveiled the proposal today as part of a package of measures designed to make Britain carbon-neutral by 2050.Mr Huhne said he foresaw cars powered by hydrogen fuel cells, improved battery technology or other new technology yet to be developed.He compared the change to the sh
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