Lights off as Earth Hour highlights climate change

During an event organized by the World Wildlife Fund, individuals and businesses were encouraged to turn off non-essential lights for an hour.

Video provided by the WWF showed buildings blacked out across Asia and Australia.

Earth Hour began in Sydney in 2007 when households and businesses were asked to turn off their lights for 60 minutes to curb carbon pollution and promote climate change awareness and it now spans more than 7000 cities worldwide.