First Earth Hour event was organized in which year?

First Earth Hour event was organized in which year?
[A]2005
[B]2008
[C]2007
[D]2010

2007
Earth Hour is a worldwide grassroots movement uniting people to protect the planet, and is organised by WWF. The first Earth Hour event was observed on March 31 2007, Sydney, Australia.

Originally written on April 8, 2015 and last modified on April 8, 2015.

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