The most common cause of COPD is cigarette smoking

[katherinejones]

I came across this quite some time back.
What worries me most is smoking has like a billion of effect on the body i thing this is the worst on.

The most common cause of COPD is cigarette smoking; about 20 percent of smokers develop lung disease. Other causes of COPD are:

breathing in dust and chemicals (vapors, irritants, and fumes), and coal dust or silica at work
indoor air pollution from cooking fuels and heating in poorly ventilated homes
secondhand smoke
childhood lung infections that can lead to problems in adulthood
inherited factor

Thought ill let all the smoker know that as lot of people out there dont know how many effects are there
(www.caring.com/articles/copd-causes)