Earth hour actively observed throughout the world

India Gate is seen lit in the above picture and then the same location in darkness when the lights are turned out for one hour to mark Earth Hour, in New Delhi, India. (AP Photo)

Comparison pics showing the completely lit up and in darkness Azadi (Freedom) tower during the worldwide Earth Hour in Tehran, Iran. (AP Photo)

The Kremlin is illuminated before the lights were turned off and then the in darkness when the lights are turned out for one hour to mark Earth Hour in Moscow, Russia. (AP Photo)

The Parthenon temple atop the Acropolis hill is seen before and after turning the lights were switched off to mark the annual Earth Hour in Athens. (AP Photo)

Boys attend a candlelight vigil during a gathering to observe Earth Hour in La Paz, Bolivia. (AP Photo)

Activists of the World Wide Fund For Nature (WWF) spell out the words Earth Hour 2014 in front of the illuminated Brandenburg gate before the lights were turned off to mark Earth Hour in Berlin. (AP Photo)

Taipei 101 skyscraper moments before and after its lights are turned off for Earth Hour 2014 in Taipei, Taiwan. (AP Photo)

Taipei 101 skyscraper moments before and after its lights are turned off for Earth Hour 2014 in Taipei, Taiwan. (AP Photo)