24 cities to go dark for Earth Hour

As many as 30 million people are tipped to switch off lights and televisions around the world to help fight climate change with 24 cities joining Earth Hour on March 29, environment group WWF said on Wednesday.ollowing last year's Earth Hour in Australia, where 2.2 million Sydneysiders powered-down for an hour, cities including Atlanta, San Francisco, Bangkok, Ottawa, Dublin, Vancouver, Montreal and Phoenix have also signed on, WWF said.They joined Copenhagen and Aarhus, Manila, Fiji's capital Suva, Chicago, Tel Aviv, Christchurch, Toronto, Odense and Aalborg, as well as major Australian cities including Melbourne, Perth, Brisbane and the national capital Canberra."If we see the same participation levels around the globe that we did in Sydney, then we can anticipate more than 30 million people involved," said Andy Ridley, Earth Hour's executive director.