LONDON - APRIL 1 : Climate camp demonstrator holds a placard while being watched by builders during G20 protests April 1, 2009 in London. 35,000 people join the demonstrator in Central London
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LONDON - APRIL 1 : Climate camp demonstrator holds a placard while being watched by builders during G20 protests April 1, 2009 in London. 35,000 people join the demonstrator in Central London