People stand around the number 60 shaped with lighted candles, representing the 60 minutes of Earth Hour, at Plaza de Mayo during the Earth Hour in Buenos Aires, capital of Argentina, on March 25, 2017. (Xinhua/Martin Zabala)
People stand around the number 60 shaped with lighted candles, representing the 60 minutes of Earth Hour, at Plaza de Mayo during the Earth Hour in Buenos Aires, capital of Argentina, on March 25, 2017. (Xinhua/Martin Zabala)