Air pollution in Beijing recently has been absolutely shocking, as the above photo can attest. At too many points in the day levels have been exceeding the testing limits of the US Embassy readings (as seen at their Twitter ). When...

Air pollution in Beijing recently has been absolutely shocking, as the above photo can attest. At too many points in the day levels have been exceeding the testing limits of the US Embassy readings (as seen at their Twitter ). When...

Air pollution in Beijing recently has been absolutely shocking, as the above photo can attest. At too many points in the day levels have been exceeding the testing limits of the US Embassy readings (as seen at their Twitter ). When...

Air pollution in Beijing recently has been absolutely shocking, as the above photo can attest. At too many points in the day levels have been exceeding the testing limits of the US Embassy readings (as seen at their Twitter ). When...

Air pollution in Beijing recently has been absolutely shocking, as the above photo can attest. At too many points in the day levels have been exceeding the testing limits of the US Embassy readings (as seen at their Twitter ). When...

Air pollution in Beijing recently has been absolutely shocking, as the above photo can attest. At too many points in the day levels have been exceeding the testing limits of the US Embassy readings (as seen at their Twitter ). When...