During “Earth Hour” on Saturday, lights went out across the world as people showed support for renewable energy.
Across the globe on March 29, people in thousands of cities observed "Earth Hour" by turning off their lights between 8:30 and 9:30 p.m. local time to raise awareness of energy use and conservation.
In Buenos Aires, people gathered around the Galileo Galilei planetarium, candles in tow.
Marcos Brindicci / Reuters
The Le Royal Hotel in Amman, Jordan.
Ali Jarekji / Reuters
In Sao Paulo, a woman danced as supporters held candles.
Paulo Whitaker / Reuters