Worldwide darkness planned for Earth Hour
27 Mar 2009
What started in 2007 as one city's protest over inaction on climate change has ignited into a worldwide movement and this weekend 1800 cities are expected to participate in this year's Earth Hour.
About one billion people will take part in a global "power down," by switching off lights and electronics from 8:30pm to 9:30pm in their local times.
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