前卫生部长:中国每年因空气污染致数十万人早死 (Former Minister of Health: Air pollution causes 100,000 pre-mature deaths in China annually)
21st Century Economics, January 7, 2014
news.163.com/14/0107/06/9HVFF4LC0001124J.html
Desolation of smog: Tackling China's air quality crisis
British Broadcasting Corporation, January 6, 2014
http://www.bbc.co.uk/news/science-environment-25576716
