People, governments, companies, and organizations observed Earth Hour 2011 as 134 countries switched off lights worldwide Saturday, March 26, at 8:30 p.m. to raise awareness about energy consumption.

Sydney Harbor, Australia

Sydney skyline

Hong Kong

Jakarta, Indonesia

Taipei, Taiwan

West Vancouver, Canada

Toronto, Canada

Singapore

Athens, Greece

Las Vegas

"Bird's Nest", in Beijing

Beijing

Rio de Janeiro, Brazil

Malasia

Opera House, Oslo, Norway

Albany, New York

Hiroshima, Japan

New York

Abu Dhabi, United Arab Emirates

Bucharest, Romania

Cairo, Egypt