Malaysia's landmark Petronas Twin Towers (L) and KL Tower (R) are illuminated before their lights are turned off to mark the Earth Hour environmental campaign in Kuala Lumpur. AFP
Activists stand in front of the Brandenburg Gate, prior the switch off of the illumination, to mark Earth Hour in Berlin, Germany. EPA
Museum of the Future in Dubai goes lights off during Earth Hour. Leslie Pableo for The National
Acropolis hill with floodlights switched off during 'Earth Hour' in Athens, Greece. EPA
A view of the Sydney Opera House after lights were switched off. Reuters
Paris' Eiffel Tower with the lights off during the Earth Hour environmental campaign. AFP
The Puente de la Mujer bridge is pictured with its lights turned off during the Earth Hour environmental campaign at Puerto Madero neighborhood in Buenos Aires. AFP
A view shows St Alexander Nevsky cathedral as the lights are being turned off for Earth Hour, in Sofia, Bulgaria. Reuters
A drone view shows the ruins of the ancient Parthenon temple atop the Acropolis hill with the lights turned off during Earth Hour, in Athens, Greece. Reuters
A large advertising screen in Piccadilly Circus is turned off to mark Earth Hour, London, Britain. Reuters
The Palace of Culture in Warsaw switched off to mark the Earth Hour environmental campaign organized by the World Wild Fund for Nature . AFP
The Cologne Cathedral, a UNESCO World Heritage Site, next to the Hohenzollern railway bridge across the river Rhine, is partly illuminated during Earth Hour in Cologne, Germany, March 23, 2024. REUTERS / Jana Rodenbusch
Lights at the Colosseum are switched off for the Earth Hour environmental campaign in Rome, Italy. EPA
A general view of Azadi (Freedom) tower after its light is switched off during the world Earth Hour in Tehran, Iran. EPA
The Telangana State Secretariat building is pictured with its lights switched off during the Earth Hour environmental campaign in Hyderabad. AFP
The Prambanan Temple, one of the largest Hindu temples in Southeast Asia and a UNESCO World Heritage Site, is pictured with its lights off during the Earth Hour environmental campaign in Yogyakarta. AFP
A man walks past the Phoenix Center after its lights are turned off for the Earth Hour environmental campaign in Beijing. AFP
The shadows of people are casted on a wall with the message 'Give an Hour for Earth' at a gathering to mark the Earth Hour environmental campaign in Manila. AFP
The landmark building Taipei 101 is seen with its lights switched off to mark the Earth Hour environmental campaign in Taipei. AFP
Malaysia's landmark Petronas Twin Towers (L) and KL Tower (R) are illuminated before their lights are turned off to mark the Earth Hour environmental campaign in Kuala Lumpur. AFP
Activists stand in front of the Brandenburg Gate, prior the switch off of the illumination, to mark Earth Hour in Berlin, Germany. EPA
Museum of the Future in Dubai goes lights off during Earth Hour. Leslie Pableo for The National
Acropolis hill with floodlights switched off during 'Earth Hour' in Athens, Greece. EPA
A view of the Sydney Opera House after lights were switched off. Reuters
Paris' Eiffel Tower with the lights off during the Earth Hour environmental campaign. AFP
The Puente de la Mujer bridge is pictured with its lights turned off during the Earth Hour environmental campaign at Puerto Madero neighborhood in Buenos Aires. AFP
A view shows St Alexander Nevsky cathedral as the lights are being turned off for Earth Hour, in Sofia, Bulgaria. Reuters
A drone view shows the ruins of the ancient Parthenon temple atop the Acropolis hill with the lights turned off during Earth Hour, in Athens, Greece. Reuters
A large advertising screen in Piccadilly Circus is turned off to mark Earth Hour, London, Britain. Reuters
The Palace of Culture in Warsaw switched off to mark the Earth Hour environmental campaign organized by the World Wild Fund for Nature . AFP
The Cologne Cathedral, a UNESCO World Heritage Site, next to the Hohenzollern railway bridge across the river Rhine, is partly illuminated during Earth Hour in Cologne, Germany, March 23, 2024. REUTERS / Jana Rodenbusch
Lights at the Colosseum are switched off for the Earth Hour environmental campaign in Rome, Italy. EPA
A general view of Azadi (Freedom) tower after its light is switched off during the world Earth Hour in Tehran, Iran. EPA
The Telangana State Secretariat building is pictured with its lights switched off during the Earth Hour environmental campaign in Hyderabad. AFP
The Prambanan Temple, one of the largest Hindu temples in Southeast Asia and a UNESCO World Heritage Site, is pictured with its lights off during the Earth Hour environmental campaign in Yogyakarta. AFP
A man walks past the Phoenix Center after its lights are turned off for the Earth Hour environmental campaign in Beijing. AFP
The shadows of people are casted on a wall with the message 'Give an Hour for Earth' at a gathering to mark the Earth Hour environmental campaign in Manila. AFP
The landmark building Taipei 101 is seen with its lights switched off to mark the Earth Hour environmental campaign in Taipei. AFP
Malaysia's landmark Petronas Twin Towers (L) and KL Tower (R) are illuminated before their lights are turned off to mark the Earth Hour environmental campaign in Kuala Lumpur. AFP
Earth Hour: Buildings go dark around the world - in pictures
