Cities go dark for Earth Hour 2013
New York City
Paris
Earth Hour was marked worldwide at 8.30 p.m. local time and is a global call to turn off lights for 60 minutes in a bid to highlight global climate change.
London
London
Minsk, Belarus
Belgrade, Serbia
Athens, Greece
Hong Kong
Taipei, Taiwan
Taipei, Taiwan
Singapore
Earth Hour began in Australia in 2007, and is now celebrated in more than 150 countries around the world.
Singapore
Moscow
New Delhi
Nusa dua, Bali
Nusa dua, Bali
Jakarta, Indonesia
With more than 150 countries taking part in last year's event, the movement has spread even further this year, with the Palestinian Territories, Tunisia, Suriname and Rwanda joining the global commemoration.