- Thethicknitrogenatmosphereholdsfog,mist,smoggyhazeandrainclouds.Theresulthasbeenmoreblue-skydaysduringtheOlympicsthansmoggyones.WeweresittinginmyofficeoverlookingShanghai'sfinancialdistrictonesmoggyday.Hisbird-spottingbookencouragesresidentsofBeijin...
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