Sydney Opera House in the dark over Earth Hour

Mar 31, 2012, 10:27 AM

SYDNEY (AP) – Sydney’s iconic Harbor Bridge and Opera House has gone dark as Australians switched off lights around the country for an hour Saturday as part of a global effort to shine a spotlight on climate change.

Hundreds of landmarks around the world including Washington’s National Cathedral, London’s Clock Tower, the Great Wall of China and Tokyo Tower will be dimmed at 8:30 p.m. local time.

The central Sydney icons have been taking part in the annual event since Earth Hour began as a Sydney-only event in 2007. Australia is among the first countries to hit the light switches each year.

(Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)

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Sydney Opera House in the dark over Earth Hour