Combo photo taken on March 30, 2019 shows lights on (R) and off of Burj Khalifa, the world's tallest building, before and during the Earth Hour event in Dubai, the United Arab Emirates. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Mahmoud Khaled)
Combo photo taken on March 30, 2019 shows lights on (Bottom) and off of Burj Khalifa, the world's tallest building, before and during the Earth Hour event in Dubai, the United Arab Emirates. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Mahmoud Khaled)
Combo photo taken on March 30, 2019 shows lights on (top) and off of the Grand Place before and during the Earth Hour event in Brussels, Belgium. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Zheng Huansong)
Combo photo taken on March 30, 2019 shows lights on (top) and off of the Grand Place before and during the Earth Hour event in Brussels, Belgium. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Zheng Huansong)
Combo photo taken on March 30, 2019 shows lights on (top) and off of the Grand Place before and during the Earth Hour event in Brussels, Belgium. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Zheng Huansong)
Photo taken on March 30, 2019 shows lights off of the Grand Place during the Earth Hour event in Brussels, Belgium. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Zheng Huansong)
Photo taken on March 30, 2019 shows lights on of the Grand Place prior to the Earth Hour event in Brussels, Belgium. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Zheng Huansong)
Photo taken on March 30, 2019 shows the lights on of the Greek Parliament prior to the Earth Hour event in Athens, Greece. Several landmarks across Greece went dark on Saturday, joining global efforts to raise awareness about climate change to save the planet. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Marios Lolos)
Photo taken on March 30, 2019 shows the lights off of the Acropolis during the Earth Hour event in Athens, Greece. Several landmarks across Greece went dark on Saturday, joining global efforts to raise awareness about climate change to save the planet. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Marios Lolos)
Photo taken on March 30, 2019 shows the lights off of the Parthenon temple during the Earth Hour event in Athens, Greece. Several landmarks across Greece went dark on Saturday, joining global efforts to raise awareness about climate change to save the planet. Earth Hour is a global initiative first launched by World Wildlife Fund (WWF) in 2007 and soon became a popular movement worldwide. (Xinhua/Marios Lolos)
