When and where did the concept of the Earth Hour started?$?

1.	When and where did the concept of the Earth Hour started?$?
A.	June, 2007 in Christchurch, New Zealand
B.	May, 2009 in Colombo, Srilanka
C.	April, 2008 in Tokyo, Japan
D.	March, 2007 in Sydney, Australia
Answer» E.

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When and where did the concept of the Earth Hour started?$?

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