Choking China: The struggle to clear Beijing's air

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Source: http://feeds.newscientist.com/c/749/f/10897/s/284cff59/l/0L0Snewscientist0N0Carticle0Cmg217290A340B50A0A0Echoking0Echina0Ethe0Estruggle0Eto0Eclear0Ebeijings0Eair0Bhtml0Dcmpid0FRSS0QNSNS0Q20A120EGLOBAL0Qonline0Enews/story01.htm

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