This photo taken on March 28, 2026 shows the Flame Towers before the start of the Earth Hour event in Baku, Azerbaijan. (Xinhua/Chen Junfeng)

This photo taken on March 28, 2026 shows the Flame Towers after the start of the Earth Hour event in Baku, Azerbaijan. (Xinhua/Chen Junfeng)

This combo photo shows the Canadian National Tower (CN Tower) with lights off (L) and on during the Earth Hour campaign in Toronto, Canada, March 28, 2026. (Photo by Zou Zheng/Xinhua)

This combo photo shows the Canadian National Tower (CN Tower) with lights off (above) and on during the Earth Hour campaign in Toronto, Canada, March 28, 2026. (Photo by Zou Zheng/Xinhua)