I found this amusing and informative. Watch and enjoy.

1. EARTH HOUR is a global event organized by WWF (World Wide Fund for Nature, also known as World Wildlife Fund) and is held on the last Saturday of March annually, asking households and businesses to turn off their non-essential lights and other electrical appliances for one hour to raise awareness towards the need to take action on climate change. Earth Hour was conceived by WWF and The Sydney Morning Herald in 2007, when 2.2 million residents of Sydney participated by turning off all non-essential lights. Following Sydney's lead, many other cities around the world adopted the event in 2008. Earth Hour 2010 took place on March 27, 2010 from 8:30p.m. to 9:30p.m., at all participant countries' respective local time.

2. Petronas Twin Towers, Kuala Lampur (Malaysia)

3. The Capitol building in Albany, New York (USA)

4. The Capitol building in Albany, New York (USA)

5. Mohammed Ali mosque, Cairo (Egypt)

6. Mohammed Ali mosque, Cairo (Egypt)

7. Hong Kong

8. Hong Kong

9. The Empire State Building, New York City (USA)

10. The Empire State Building, New York City (USA)

11. Forbidden City, Beijing (China)

12. Forbidden City, Beijing (China)

13. Hiroshima Castle, Hiroshima (Japan)

14. Hiroshima Castle, Hiroshima (Japan)

15. Hong Kong

16. Hong Kong

17. Jakarta City (Indonesia)

18. Jakarta City (Indonesia)

19. Las Vegas, Nevada (USA)

20. Las Vegas, Nevada (USA)

21. Petronas Twin Towers, Kuala Lampur (Malaysia)

22. Petronas Twin Towers, Kuala Lampur (Malaysia)

23. Moscow State University, Moscow (Russia)

24. Moscow State University, Moscow (Russia)

25. Ontario (Canada)

26. Ontario (Canada)

27. Parthenon, Athens (Greece)

28. Parthenon, Athens (Greece)

29. Rio de Janeiro (Brazil)

30. Rio de Janeiro (Brazil)

31. Pacific Science Center, Seattle (USA)

32. Pacific Science Center, Seattle (USA)

33. Orchard Road, Singapore

34. Orchard Road, Singapore

35. Sydney (Australia)

36. Sydney (Australia)

37. YAS Marina Hotel, Abu Dhabi (United Arab Emirates)

38. YAS Marina Hotel, Abu Dhabi (United Arab Emirates)