Tokyo Tower

This combo of pictures shows Tokyo's landmark the Tokyo Tower before (top) and after its lights were turned off for the 6th annual Earth Hour global warming campaign in central Tokyo on March 31, 2012.

( YOSHIKAZU TSUNO/AFP / March 31, 2012 )

This combo of pictures shows Tokyo's landmark the Tokyo Tower before (top) and after its lights were turned off for the 6th annual Earth Hour global warming campaign in central Tokyo on March 31, 2012.

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