Lights out for Earth Hour from East to West

China's National Stadium, also known as the Bird's Nest, with its lights on (top) and off (above) during the annual Earth Hour event in the capital on Saturday. Millions of people around the world were expected to switch off their lights for Earth Ho
Over on the other side of the world, Britain's Houses of Parliament (above) marked the event by going dark.PHOTOS: REUTERS, AGENCE FRANCE-PRESSE
China's National Stadium, also known as the Bird's Nest, with its lights on (top) and off (above) during the annual Earth Hour event in the capital on Saturday. Millions of people around the world were expected to switch off their lights for Earth Ho
Over on the other side of the world, Britain's Houses of Parliament marked the event by going dark (above).PHOTOS: REUTERS, AGENCE FRANCE-PRESSE
China's National Stadium, also known as the Bird's Nest, with its lights on (top) and off (above) during the annual Earth Hour event in the capital on Saturday. Millions of people around the world were expected to switch off their lights for Earth Ho
China's National Stadium, also known as the Bird's Nest, with its lights on (above) and off during the annual Earth Hour event in the capital on Saturday. PHOTOS: REUTERS, AGENCE FRANCE-PRESSE
China's National Stadium, also known as the Bird's Nest, with its lights on (top) and off (above) during the annual Earth Hour event in the capital on Saturday. Millions of people around the world were expected to switch off their lights for Earth Ho
China's National Stadium, also known as the Bird's Nest, with its lights on and off (above) during the annual Earth Hour event in the capital on Saturday. PHOTOS: REUTERS, AGENCE FRANCE-PRESSE

China's National Stadium, also known as the Bird's Nest, with its lights on and off during the annual Earth Hour event in the capital on Saturday. Millions of people around the world were expected to switch off their lights for Earth Hour on Saturday in a global effort to raise awareness about climate change that was even to be monitored from space. Over on the other side of the world, Britain's Houses of Parliament marked the event by going dark.

A version of this article appeared in the print edition of The Straits Times on March 21, 2016, with the headline 'Lights out for Earth Hour from East to West'. Print Edition | Subscribe