.@dktatlow: Smog didn't stop some from running in Beijing marathon http://nyti.ms/1ptFXo7 but study finds it should http://bit.ly/1r3vkYh
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.@dktatlow: Smog didn't stop some from running in Beijing marathon http://nyti.ms/1ptFXo7 but study finds it should http://bit.ly/1r3vkYh