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.
The main cause of emphysema is smoking. The tiny air sacs or alveoli at the bottom of the lungs, which cover a huge lung area, are surrounded by tiny blood vessels. Here, as the oxygen reaches the alveoli, it is absorbed by the blood vessels and then transferred into the bloodstream and to the rest of the body.