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.
The mood and/or tone is how the story says the words and how the characters feel. Let's say your reading a horror story the tone so far is scary because people in the story ma â¦ y be screaming getting pulled from under beds and etc. So that is what a mood and tone of a story is.ne major factor that sets the mood of a story is how the main  character sees the world. It's his own point of view that opens the  reader's own eyes to that world. The wor â¦ ld could be coming to the  end and we could be laughing.