Although the disc media and the drives of the CD and CD-ROM are, in principle, the same, there is a difference in the way data storage is organized. Two new sectors were defined, Mode 1 for storing computer data and Mode 2 for compressed audio or video/graphic data.
Most emphysema causes involve repeated breathing in of fumes and other things that irritate and damage the lungs and airways. Specific causes of emphysema can include: 1  Cigarette smoking. 2  Pipe, cigar, and other types of tobacco.3  Certain fumes or dust. 4  Genetic factors.ost emphysema causes involve repeated breathing in of fumes and other things that irritate and damage the lungs and airways. Specific causes of emphysema can include: 1  Cigarette smoking. 2  Pipe, cigar, and other types of tobacco.
At its worst, emphysema can cause air hunger.. This is the constant feeling of being unable to catch one's breath. These respiratory symptoms are the same regardless of the cause of the emphysema. However, two people with the same degree of lung damage may have different symptoms. One person with mild emphysema may feel very short of breath. Another person with more advanced stages of the disease may be hardly bothered by symptoms.