Another eight cities have joined WWF’s 2008 Earth Hour climate change campaign, bringing the tally of international cities up to 24.

Atlanta, San Francisco, Phoenix, Bangkok, Ottawa, Vancouver, Montreal and Dublin will join Sydney, Perth, Melbourne, Canberra, Brisbane, Adelaide, Copenhagen, Aarhus, Aalborg, Odense, Manila, Suva, Chicago, Tel Aviv, Toronto and Christchurch.

WWF is still hoping more cities will get involved.

During Earth Hour last year, 2.2 million Sydney residents turned off lights and appliances for one hour to help reduce the city’s greenhouse gas pollution. With 24 global cities on board for Earth Hour, WWF anticipates that more than 30 million people will be involved this year.

Whether your city has signed up or not, you can get involved. Visit the website and sign up to Earth Hour, plus make sure you switch off lights and non-essential appliances for one hour between 8pm and 9pm on March 29, local time.

In 2007 Sydney icons like the Harbour Bridge and Opera House turned their lights off for Earth Hour and the world took notice. Inspired by the collective effort of millions of Sydneysiders, many cities around the world are joining Earth Hour in 2008, turning a symbolic event into a global movement.

At 8pm on the 29 March 2008 millions of people in some of the world’s biggest cities including Copenhagen, Toronto, Chicago, Melbourne, Brisbane, Tel Aviv and Manila will unite and switch off for Earth Hour.

Earth Hour 2007 was a Sydney event. Earth Hour 2008 is a global movement.

Earth Hour is about individual action and how together we can make a difference. Visit EarthHour.org and add your name to the Earth Hour movement.