Tobacco use causes an believed 20% of Long-term lung ailments in the U.S., for example Persistent bronchitis and emphysema, and will cause pneumonia in People with chronic lung ailment. The CDC, in 2011, estimated that ninety% of deaths from chronic obstructive lung disorder (COPD) had been resulting from cigarette smoking. http://science-journals-free03703.blogpostie.com/3340278/considerations-to-know-about-health-news-today