Flickr Countdown to Earth Hour 31 days to go China The Forbidden City is shrouded in darkness with its lights turned off as WWF China holds an Earth Hour event at its north gate in Beijing, China. 27 March 2010. © WWF/Simon Lim
The Forbidden City is shrouded in darkness with its lights turned off as WWF China holds an Earth Hour event at its north gate in Beijing, China. 27 March 2010.
© WWF/Simon Lim