Obviously one can stop smoking, or exposing oneself to contaminated air from whatever source.
I believe COPD is usually due to damage done to the lungs by exposure to unhealthy environments... get out of them and live near sea level, this will help prevent further damage, and improve the quality of life however long it lasts.
Think yourself better than what others tell you, you can be well, so be well. God in heaven is on your side and you have the power within yourself if he abides there. What were people told by Jesus when healed, Go and ... no more. :)
Proverbs 23:7 "For as he thinketh in his heart, so is he: Eat and drink, saith he to thee; But his heart is not with thee."
My girlfriend was diagnosed 10 years ago, and she is still ticking. She will tell you that no man can put a number on her life. Only the Lord Jesus Christ knows that. You are blessed. I want you to go to a websit called ****.com