(Agencies)
Updated: 2008-03-29 21:09

This combination of two images shows the Sydney Harbor Bridge and Sydney Opera House illuminated by lights (top), then seen with the lights turned off, March 29, 2008, in Sydney, Australia. Thousands of lights that illuminate office buildings, public structures and monuments were switched off Saturday darkening the city's iconic skyline for one hour, in an effort to publicise the effects of climate change. [Agencies]

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