A week ago, on Saturday, March 28, iconic landmarks and skylines were plunged into darkness as people and businesses around the world participated in Earth Hour 2015, turning off their lights at 8:30 p.m. local time. Earth Hour was organized by the World Wildlife Fund in 2007 as a way to bring attention to energy consumption, sustainability, and climate-change issues. The images below (starting with photo number two) are interactive—click on each image to "turn off the lights."
Earth Hour 2015
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In this two-photo combination picture, the Eiffel Tower is shown with its usual lighting at left, and after the lighting was switched off at right, at the occasion of the Earth Hour, in Paris, France, on March 28, 2015. #
Remy de la Mauviniere/AP -
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A before-and-after pair of images show the Niteroi Contemporary Art Museum (MAC) lit up and with lights off during Earth Hour in Niteroi, a neighboring city of Rio de Janeiro, Brazil, on March 28, 2015. [Click the image to view transition.] #
Yasuyoshi Chiba/AFP/Getty Images -
The Sydney Harbor Bridge and Opera House is shown before and after being plunged into darkness after fireworks started the Earth Hour environmental campaign, on March 28, 2015. [Click the image to view transition.] #
Peter Parks/AFP/Getty Images -
The Belarusian National Library is lit, then submerged into darkness for the Earth Hour environmental campaign in Minsk on March 28, 2015. [Click the image to view transition.] #
Sergei Gapon/AFP/Getty Images -
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The Grand Palace is shown before and after its lights were turned off to mark Earth Hour in Bangkok on March 28, 2015. [Click the image to view transition.] #
Pornchai Kittiwongsakul/AFP/Getty Images -
The monument to Francysk Skaryna and the Belarusian National Library is seen before and after being submerged into darkness for the Earth Hour environmental campaign in Minsk on March 28, 2015. [Click the image to view transition.] #
Sergei Gapon/AFP/Getty Images -
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Leifeng Pagoda is seen behind the West Lake before and during Earth Hour in Hangzhou, Zhejiang province, China, on March 28, 2015. [Click the image to view transition.] #
Chance Chan/Reuters -
The Kremlin is seen before and after being submerged into darkness for the Earth Hour environmental campaign in central Moscow on March 28, 2015. [Click the image to view transition.] #
Dmitry Serebryakov/AFP/Getty Images -
The Old Bridge is shown before and during Earth Hour in Mostar on March 28, 2015. The 16th-century bridge was destroyed during the war in Bosnia between 1992 and 1995, rebuilt, and opened again in 2004. [Click the image to view transition.] #
Dado Ruvic/Reuters -
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Pictures taken on March 28, 2015, in central London show the Houses of Parliament before and after being submerged into darkness for the Earth Hour environmental campaign. [Click the image to view transition.] #
Glyn Kirk/AFP/Getty Images -
The illuminated Serbian Parliament building is shown before, then in darkness when the lights are turned out for one hour to mark Earth Hour, in Belgrade, Serbia, on March 28, 2015. [Click the image to view transition.] #
Darko Vojinovic/AP
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