The document shows before and after photos from Earth Hour 2010, an annual event where landmarks and cities around the world turn off non-essential lights for one hour to raise awareness about climate change and energy consumption. Photos depict places like the Acropolis in Athens, Petronas Towers in Kuala Lumpur, Las Vegas Strip, Sydney Opera House, Moscow State University, Forbidden City in Beijing, and more switching off their lights during Earth Hour on March 27, 2010.
5. Overview of Hong Kong Island and Kowloon with lights on to mark Earth Hour 2010
6. Overview of Hong Kong Island and Kowloon with lights off to mark Earth Hour 2010
7. A before view of the Las Vegas Strip seen during Earth Hour on March 27, 2010 in Las Vegas, Nevada
8. An after view of the Las Vegas Strip seen during Earth Hour on March 27, 2010 in Las Vegas, Nevada
9. A before view of shopping malls on Orchard Road during Earth Hour in Singapore March 27, 2010.
10. An after view of shopping malls on Orchard Road during Earth Hour in Singapore March 27, 2010
11. The National Stadium, also known as the "Bird's Nest", before Earth Hour in Beijing, China March 27, 2010.
12. The National Stadium, also known as the "Bird's Nest", during Earth Hour in Beijing, China March 27, 2010.
13. Moscow State University seen before the lights are turned off during the worldwide Earth Hour, a global campaign to highlight the threat of climate change in Moscow Saturday, March 27, 2010
14. Moscow State University seen after the lights were turned off during the worldwide Earth Hour, a global campaign to highlight the threat of climate change in Moscow Saturday, March 27, 2010
15. The Sydney skyline is seen before the lights are switched off for Earth Hour on March 27, 2010.
16. The Sydney skyline after the lights were switched off for Earth Hour on March 27, 2010.
17. A before view of a square near the Bundaran Hotel in Jakarta, Indonesia
18. An after view of a square near the Bundaran Hotel in Jakarta, Indonesia
19. The Forbidden City, seen before the Earth Hour 2010 power switch off on March 27, 2010 in Beijing, China
20. The Forbidden City, seen during the Earth Hour 2010 power switch off on March 27, 2010 in Beijing, China
21. A view of Copacabana beach in Rio de Janeiro, Brazil before Earth Hour March 27, 2010
22. A view of Copacabana beach in Rio de Janeiro, Brazil during Earth Hour March 27, 2010