earth-hour 的英语阅读?

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  • earth-hour started in Sydney on march 31,2007 .more than 2.2million homes and businesses( turned )off their lights for an hour.( A )year later,on March 29,earth hour 2008 became a global activity and ( was )supported by 50 million people from thirty-five( countries ) this year,on March28,over2100cities in eight countries ( took )part in it .and( the Earth- )Hour came to china.Theactivity aims to save ( energy )and improve climate.We may have ( different )ways to spend the hour.Come on!Join us in Earth Hour 2010!