The #1 cause of COPD worldwide is unvented wood and coal fires. It also has causes other than smoking.
That may be so but in the case with my inbreed neighbor when the doctor tells you to quit because you are in the first stages of COPD then one can only suppose it is more than a “good idea”. I should also say this inbreed was/is an obama voter so we know who is and will be paying for her death long battle with COPD. So why should she care? She just takes of her nicotine patch that was “given” to her and smokes some more at the expense of all of us.