LOOK: Earth Hour around the world

A family picnics in front of the Quezon Memorial Shrine after the switching off lights for the Earth Hour environmental campaign in Manila on March 24, 2018. AFP

This combination of pictures created on March 25, 2017, shows the statue of Christ the Redeemer before (left) and after being plunged into darkness for the Earth Hour environmental campaign on top of Corcovado hill in Rio de Janeiro, Brazil, on March 25, 2017. AFP

This combination of pictures created on March 24, 2018, shows the landmark India Gate monument before (top) and after the lights were switched off (bottom) during the Earth Hour campaign in New Delhi. AFP

This combination of pictures shows a general view of Marina Bay Sands hotel and resort lit up and with the lights turned off during the earth hour environmental campaign in Singapore on March 24, 2018. AFP PHOTO / ROSLAN RAHMAN

A combination photo shows the Sydney Harbor Bridge and Opera House being plunged into darkness for the Earth Hour environmental campaign on March 24, 2018. AFP PHOTO / PETER PARKS

Activists of the Red Cross NGO light up candles forming the number “60”, during the “Earth Hour” event at Skopje main square, on March 24, 2018.  AFP PHOTO / Robert ATANASOVSKI

A combination of pictures shows the ancient Acropolis with lights on (up) and off (bottom), during the Earth Hour in Athens on March 25, 2017. AFP

This combination of pictures shows the ancient Colosseum normal lighted (up) Colosseum in the dark (down) during the Earth Hour initiative in Rome on March 24, 2018. Earth Hour, which started in Australia in 2007, is being observed by millions of supporters in 187 countries. AFP

A picture taken on March 25, 2017, in Moscow, shows St.Basil’s Cathedral and the GUM department store before the lights are turned off for the Earth Hour environmental campaign. / AFP PHOTO / Alexander UTKIN