Lights go out around the world for 10th Earth Hour

The Sydney Harbour Bridge seen during the tenth anniversary of Earth Hour in Sydney, Australia, March 25, 2017. REUTERS/David Gray

(Reuters) - The lights are being switched off around the world at 8:30 p.m. on Saturday evening, to mark the 10th annual Earth Hour, and to draw attention to climate change.

The initiative began in Australia in 2007 as a grass roots gesture by the World Wildlife Fund (WWF) Australia against man-made carbon dioxide emissions linked to a warming planet.