Cities worldwide dim lights to mark Earth Hour - Yahoo News

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1. Cities worldwide dim lights to mark Earth Hour  Yahoo News
2. For a brief period tonight, some parts of the world will go dark. It's Earth Hour  CNN
3. World celebrates “Earth Hour” by turning off non-essential lights  CBS Evening News
4. Global landmarks turn off the lights to mark annual Earth Hour  The Guardian
5. Las Vegas celebrates Earth Hour tonight  KTNV Channel 13 Las Vegas
6. View Full Coverage on Google News

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