People light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
Two women light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
This combination of pictures created on March 24, 2018 shows the Burj Khalifa skyscraper lit up and with the lights turned off during the earth hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
Dubai, March 24, 2018: Dubai residents participate in the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
View of Burj Khalifa just before the Earth Hour Walk at the Marasi promenade in Dubai.
Dubai, March 24, 2018: Emiratii women lights the candles during the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
Dubai, March 24, 2018: Emiratis participate in the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
Dubai, March 24, 2018: Dubai residents participate during the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
Dubai, March 24, 2018: Dubai residents participate in the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
A man and two children light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
People light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
Two women light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
This combination of pictures created on March 24, 2018 shows the Burj Khalifa skyscraper lit up and with the lights turned off during the earth hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
Dubai, March 24, 2018: Dubai residents participate in the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
View of Burj Khalifa just before the Earth Hour Walk at the Marasi promenade in Dubai.
Dubai, March 24, 2018: Emiratii women lights the candles during the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
Dubai, March 24, 2018: Emiratis participate in the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
Dubai, March 24, 2018: Dubai residents participate during the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
Dubai, March 24, 2018: Dubai residents participate in the Earth Hour Walk at the Marasi promenade in Dubai. Satish Kumar for the National
A man and two children light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE
People light candles after the building lights were switched off for the Earth Hour environmental campaign in Dubai on March 24, 2018.
Earth Hour, which started in Australia in 2007, is set to be observed by millions of supporters in 187 countries, who will turn off their lights at 8.30pm local time in what organisers describe as the world's "largest grassroots movement for climate change". / AFP PHOTO / Giuseppe CACACE