EARTH HOUR ...MARCH 31 >>>8.30PM TO 9.30 PM(Q.NO:106:When and where did the earth hour observe for the first time?)

The Earth Hour 2012 will be observed on March 31 from 8.30pm to 9.30pm, when people all over the world will turn off the lights to create awareness about climate change. 

 Paris Eiffel tower before and during Earth Hour.

 
PLEASE OPEN THE LINK BELOW  TO SEE SOME WONDERFUL EARTHHOUR MOMENTS     
   Towers and landmarks BEFORE AND DURING EARTH HOUR(Picture no.10 to 14 are SUPERB)

ANSWER:
Earth Hour, launched in 2007 in Australia by theWorld Wide Fund for Nature (WWF)