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.
Causes of emphysema. The biggest known cause or risk factor for emphysema-and for COPD-is smoking.4,6-8 Cigarette smoking is responsible for around 90% of cases of COPD.7 However, COPD will develop only in smokers who are genetically susceptible-smoking does not always lead to the disease.8. Smoking is the leading cause of emphysema.