Researchers at the University of Colorado-Denver in the USA find that secondhand smoke induces a level of lung inflammation that causes smoke-related illnesses such as cancer, heart disease, diabetes and others.
http://www.upi.com/Health_News/2010/08/28/Smoking-causes-inflammation-in-lungs/UPI-67431282975649/ http://www.shortnews.com/start.cfm?id=85270