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CNN (March 31, 2007) reports that the City of Sydney, Australia, blacked out its skyline to mark the need for energy conservation in response to human induced climate change.

"Throughout the city of about 4 million people, residents turned off the lights for one hour in an event organized by environmentalists and supported by Sydney city officials, the New South Wales state government and thousands of businesses.

Restaurants throughout the city announced candlelight-only specials, and families gathered in parks and other public places to take part in a countdown to lights out, sending up a cheer when the switch was flicked at 7:30 p.m. local time.

Saturday's event kicked off a campaign to encourage Sydney residents to conserve energy by turning off lights, computers and other electrical equipment when they're not being used -- steps that could cut Sydney's greenhouse gas emissions by 5 percent a year.

'Tonight is really important because it's a call to action,' Sydney Mayor Clover Moore told Sky News. 'We are asking people to think about the action they can take to fight global warming. We all have to act to reduce out ecological footprint.'

Australia, a nation of around 21 million people, is ranked as the world's worst greenhouse gas emitter per capita, largely because of its heavy reliance on coal-fired power stations."

You can read the whole CNN report here:

Sydney in climate change blackout