Cigarette smoking is the leading environmental cause of COPD. Most people who have it smoke or used to smoke. 50% of smokers develop COPD during their lifetime.
Still, many smokers never get the disease.
Related Questions
I am on supplemental oxygen but at times I get very short of breath although my oxygen saturation levels are okay. Why does this happen?
My husband has had COPD for a few years now. Lately, he has been sleeping a lot more than he used to. I mean he sleeps for almost the entire day, waking up just to eat and may be watch a bit of TV. Is this normal for COPD patients or should I be worried?