Only a year later and Earth Hour had become a global sustainability movement with more than 50 million people across 35 countries participating.

The Earth Hour was participated by nearly 4,000 cities and towns in 88 countries, an effort to call attention to climate change.

A group of around 30 people took part in a rally at the power station ahead of the 2009 Earth Hour.

"Earth Hour," which comes the last Saturday of March every year, is so important.

Since 2008, City lights are turned off annually in support of Earth Hour.

The official website for the event, earthhour.org, received over 6.7 million unique visitors in the week leading up to Earth Hour.

Sydney, being the city that participated in both the 2007 and 2008 Earth Hours, cut electricity consumption by 8.4%.

Earth Hour has also received free publicity from the Google corporation.

Earth Hour is past the beginning now, and lots of people are switching their lights off every year in March.

At the time of the accident the street lights had been turned off as part of the Earth Hour.