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.
Mood is the feeling you get while reading a story. This could be happiness, sadness, darkness, anger, suspicion, loneliness, or even excitement. You can think of mood as the atmosphere of the story. To describe mood, you should think about the setting and the language used by the author. In the opening story, we saw the setting as dark and the weather angry. The narrator used language that created fear, such as cold and black. The mood of a story can change how we identify the thesis and the characters.