In 2007 Sydney started the first ever Earth Hour event, by persuading as many businesses and individuals as possible to switch off their lights.
This year the city was almost completely engulfed in darkness; over two million individuals and more than two thousand businesses took part.
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Major changes are expected to be unveiled at the secretive state's rare Congress meeting - but journalists were shut out as it got underway.
The Welsh reality star has suffered a debut election defeat - and revealed he had a tough time on the campaign trail.
Labour strongholds tended to remain so - apart from a major loss for the party in Dudley.