Following announcements from Beijing and Shaanxi on contingency plans for heavily polluted days, China Daily reporter D J Clark sets out to investigate what he can do to protect his family at home.
With thanks to Dr Richard Saint Cyr who blogs at http://myhealthbeijing.com and Dr Chris Buckley from the Torana Clean Air Center.
Video: D J Clark, Xu Jiye & Huan CAO
Producer: Flora Yue
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