Emphysema is a form of chronic (long-term) lung disease. People with emphysema have difficulty breathing from a limitation in blowing air out. There are multiple causes of emphysema, but smoking is by far the most common.Emphysema is one of the main types of chronic obstructive pulmonary disease (COPD).ost commonly, the toxins in cigarette smoke create the damage. The lung changes of emphysema evolve slowly over years: 1  As the fragile tissues between air sacs are destroyed, air pockets in the lungs develop. 2  Air becomes trapped in these spaces of damaged lung tissue.
Tone is an author's style or manner of expression. It gives the   reader clues as to how the author feels about his/her subject.
Weâll take a look at all three. Tone in fiction is the attitude of the narrator or viewpoint character toward story events and other characters. In a story with first-person POV, tone can also be the narratorâs attitude toward the reader. In non-fiction, tone is the writerâs attitude toward subject matter and reader. So the writer might come across as a know-it-all or a blowhard or as humble or solicitous. Weâre all familiar with a motherâs words to her mouthy sonâDonât you take that tone with me, young man.