周医生好。我搭个车，添一篇JAMA的文献，供大家参考。

Lung Cancer, Cardiopulmonary Mortality, and Long-term Exposure to Fine Particulate Air Pollution

http://jama.jamanetwork.com/article.aspx?articleid=194704

“Each 10-?g/m3 elevation in fine particulate air pollution was associated with approximately a 4%, 6%, and 8% increased risk of all-cause, cardiopulmonary, and lung cancer mortality, respectively. ”