The document shows before and after photos of major cities and landmarks around the world participating in Earth Hour 2010 by turning off non-essential lights for one hour to raise awareness about climate change. Locations featured include Hong Kong, Las Vegas, Sydney, Seattle, Athens, Jakarta, Beijing, Toronto, Cape Town, and Singapore. The photos illustrate how towns and skylines appeared before and during the annual event encouraging environmental protection and reduced energy usage.
4. A before-and-after view of the Las Vegas Strip seen during Earth Hour from Mix at THEhotel at Mandalay Bay March 27, 2010 in Las Vegas, Nevada. (Ethan Miller/Getty Images)
5. A before-and-after view of the Las Vegas Strip seen during Earth Hour from Mix at THEhotel at Mandalay Bay March 27, 2010 in Las Vegas, Nevada. (Ethan Miller/Getty Images)
6. The Sydney skyline is seen before and after the lights are switched off for Earth Hour on March 27, 2010 in Sydney, Australia. Earth hour this year aims to highlight everyone’s environmental footprint on the earth, encouraging individuals to reduce their impact on the planet and help reduce pollution and climate change. (Lisa Maree Williams/Getty Images)
7. The Sydney skyline is seen before and after the lights are switched off for Earth Hour on March 27, 2010 in Sydney, Australia. Earth hour this year aims to highlight everyone’s environmental footprint on the earth, encouraging individuals to reduce their impact on the planet and help reduce pollution and climate change. (Lisa Maree Williams/Getty Images)