World landmarks dimmed for Earth Hour

The Brandenburg gate is brightly lit prior to going dark as the landmark switched off the lights to mark 'Earth Hour' in Berlin, Saturday, March 31, 2012. Earth Hour takes place worldwide at 8.30 p.m. local time and is a global call to turn off lights for 60 minutes in a bid to highlight the global climate change. (AP Photo/Markus Schreiber)