Xinhua: About 2.9 million people of Hong Kong participated in Earth Hour 2009, a World Wide Fund for Nature’s (WWF) environmental protection event, announced WWF Hong Kong on Tuesday. According to a survey commissioned by WWF, 58 percent of 984 people aged between 18 and 64 interviewed across Hong Kong said they participated in Earth Hour. This amounts to approximately 2.9 million people, which significantly exceeded the initial target of 1 million people. At 8:30 p.m. on March …