Yes. Because emphysema happens over a period of years, most patients are older when they develop symptoms of it. Because there is such a gradual deterioration in lung function sometimes patients have mild symptoms for many months before they are diagnosed with emphysema.
Yes. It depends on your definition of "older". ;) emphysema is damage to the lungs, commonly from smoking, but it is rarely caused by a genetic condition called "alpha one antitrypsin" deficiency. People who have low levels of this enzyme develop emphysema at a younger age, and it is worse if those same people smoke. Usually emphysema is seen in smokers in their 60's and up, but can be seen earlier.