MCQ Earth hour is an approach of energy conservation and sustainable use, begin in-
Earth hour is an approach of energy conservation and sustainable use, begin in-
(A).London (UK) (B).Sydney (Australia)
(C).Kyoto (Japan) (D).New York (USA)
Earth hour began in Sydney (Australia) in 2007 with about two million participants.
The voluntary one hour blackout has since, grown into an international events as a sign of
action against globle warming. The event is held worldwide to turn of non-essential lights
for one hour, from 8:30 to 9:30pm towards the end of march.