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.

1. EARTH HOUR 2010

2. The Acropolis during Earth Hour in Athens, Greece on March 27, 2010.

3. Malaysia's Petronas Twin Towers before Earth Hour in Kuala Lumpur on March 27, 2010

4. Malaysia's Petronas Twin Towers during Earth Hour in Kuala Lumpur 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

23. Lights switched on in Toronto's financial district, Ontario, Canada

24. Lights switched off in Toronto's financial district, Ontario, Canada

25. The Hong Kong skyline before turning the lights off on Saturday, March 27, 2010 to mark the annual Earth Hour

26. The Hong Kong skyline after turning the lights off on Saturday, March 27, 2010 to mark the annual Earth Hour

27. The Oslo Opera House in Oslo, Norway before Earth Hour on March 27th, 2010

28. The Oslo Opera House in Oslo, Norway during Earth Hour on March 27th, 2010

29. The Capitol building in Albany, New York, before Earth Hour 2010 on March 27th

30. The Capitol building in Albany, New York, during Earth Hour 2010 on March 27th

31. Hiroshima Castle before Earth Hour in Hiroshima, Japan on March 27th, 2010

32. Hiroshima Castle during Earth Hour in Hiroshima, Japan on March 27th, 2010

33. The YAS Marina Hotel before Earth Hour 2010 in Abu Dhabi, United Arab Emirates.

34. The YAS Marina Hotel during Earth Hour 2010 in Abu Dhabi, United Arab Emirates.

35. Romania's Parliament building before Earth Hour at 8:30pm in Bucharest March 27, 2010

36. Romania's Parliament building during Earth Hour at 8:30pm in Bucharest March 27, 2010

37. Table Mountain, above Cape Town, South Africa, seen before Earth Hour 2010

38. Table Mountain, above Cape Town, South Africa, seen during Earth Hour 2010

39. The Forbidden City, seen before Earth Hour in Beijing, China on March 27, 2010

40. The Forbidden City, seen during Earth Hour in Beijing, China on March 27, 2010

41. The Mohammed Ali mosque at the Salaheddine Citadel before Earth Hour in the Egyptian capital of Cairo on March 27, 2010

42. The Mohammed Ali mosque at the Salaheddine Citadel during Earth Hour in the Egyptian capital of Cairo on March 27, 2010

43. Buildings in the central business district before Earth Hour in Singapore March 27, 2010

44. Buildings in the central business district during Earth Hour in Singapore March 27, 2010

45. THE END Press ‘Esc’ To Exit