A combination picture shows a view of the Hong Kong's financial district's (L-R) Bank of China Tower, Cheung Kong Centre, HSBC headquarters, Standard Chartered Bank and Legislative Council before (top) and during Earth Hour March 28, 2009.

Lights went out at Sydney’s Opera House and Harbour Bridge on Saturday for Earth Hour 2009, a global event in which landmarks and homes go dark for an hour to highlight the threat from climate change.In Asia, lights at landmarks in China, Singapore, Thailand and the Philippines also dimmed as people celebrated with candle-lit picnics and concerts.”It’s been a great success. I wasn’t expecting so many people to come down and witness the blackout of the CBD,” Carine Seror, Singapore Earth Hour campaign manager for global environment group WWF, told Reuters.

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