The term COPD is an abbreviation for chronic obstructive pulmonary disease. COPD is a general term used to describe the chronic lung disease linked with cigarette smoking and worsened by contact with industrial dusts and other toxins. This is a combination of emphysema and chronic bronchitis. It is a disease that worsens over time, especially when smoking continues. With emphysema there is a relatively irreversible decrease in airflow and permanent destruction of the airsacs in the lung.
Chronic bronchitis is a cough with mucus that lasts for at least 3 months in a row 2 years in a row. This develops from long-term irritation of the airways and is most often associated with smoking. Your chest x-ray and spirometry may be normal with chronic bronchitis.
Although there may not be a change in your spirometry after using your inhalers, you may experience improvement in your symptoms, especially after using the Ventolin
Your doctor is right that smoking is bad for your lungs & health. 95% is really a great number and to preserve that, please quit smoking. Folks don't generally die from chronic bronchitis or emphysema, they generally just have more & more trouble carrying out daily activities and breathing. Eventually, they can have secondary problems, like heart failure and others related to their lung condition, and require supplemental oxygen.
There is no magic way to make smoking "safe" or OK for your lungs & body, only taking responsibility for quitting & asking for help as needed (there are some aids docs can prescribe to help if YOU really want to quit).
Good luck!
Starion