The world turned off its lights on March 26 for an hour from 8.30 p.m. local time as a show of support for tougher action to confront climate change.

Earth Hour is a global event organized by World Wide Fund for Nature 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.

The following are photos of some major cities and major landmarks around the world, detailing the differences between a normal hour and the dramatic change when the Earthday hour went into affect.

Japans Deputy Prime Minister Naoto Kan arrives at a lower house plenary session at Parliament in Tokyo
Japan`s Deputy Prime Minister Naoto Kan arrives at a lower house plenary session at Parliament in Tokyo September 18, 2009. REUTERS
New Delhi, During
A view shows the India Gate before Earth Hour in New Delhi Reuters
New Delhi, Before
A view shows the India Gate before Earth Hour in New Delhi Reuters
Berlin, Before
A view of Berlin's skyline with the television tower Brandenburg Gate is pictured before Earth Hour Reuters
Berlin, During
A view of Berlin's skyline with the television tower Brandenburg Gate is pictured before Earth Hour Reuters
Berlin, During
Tower of Berlin's Red Town Hall is seen shortly after its illumination was switched off as part of Earth Hour Reuters
Cairo, During
A view shows the great Giza pyramids and the Sphinx during Earth Hour in Cairo Reuters
Cairo, Before
A view shows the great Giza pyramids and the Sphinx during Earth Hour in Cairo Reuters
Berlin, Before
Tower of Berlin's Red Town Hall is seen shortly before its illumination is switched off as part of Earth Hour Reuters
Climate change Earth day Earth Climate change