Yes. If your spouse smoked daily and you lived in a small space/home with them. May also be exposed to many irritants during job exposure if working in a factory.
Yes... There are types of COPD that can occur in non-smokers, like alpha-1-antitrypsin deficiency, which is an enzyme deficiency that leads to a type of emphysema, a form of copd. These patients can be treated with enzyme replacement therapy. They often develop COPD at a younger age and if they do smoke, this disease is more severe. It is diagnosed via a blood test.
Occasionally. About 10% of COPD patients have never smoked. Therefore it is rare.