Islamabad marks Earth Hour

Participants in Islamabad, Pakistan take part inn Earth Hour
Participants in Islamabad, Pakistan take part inn Earth Hour Credit: AP Photo/Anjum Naveed

Pakistan marked Earth Hour 2012 by lighting candles for sixty minutes.

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Lights go out for Earth Hour

Hundred's of landmarks around the world will switch off their lights at 8.30pm local time as part of a global effort to shine a spotlight on climate change