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.
Emphysema gradually damages the air sacs (alveoli) in your lungs, making you progressively more short of breath. Emphysema is one of several diseases known collectively as chronic obstructive pulmonary disease (COPD).Smoking is the leading cause of emphysema.Your lungs' alveoli are clustered like bunches of grapes. In emphysema, the inner walls of the air sacs weaken and eventually rupture â creating one larger air space instead of many small ones.This reduces the surface area of the lungs and, in turn, the amount of oxygen that reaches your bloodstream.our lungs' alveoli are clustered like bunches of grapes. In emphysema, the inner walls of the air sacs weaken and eventually rupture â creating one larger air space instead of many small ones. This reduces the surface area of the lungs and, in turn, the amount of oxygen that reaches your bloodstream.