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 is a chronic (long-term) lung disease, usually caused by smoking. Emphysema is the main form of chronic obstructive pulmonary disease (COPD).Diagnosing emphysema usually requires pulmonary function tests, combined with a history of symptoms, such as shortness of breath.iagnosing emphysema can't be done with an X-ray alone. Computed tomography (CT scan) of the chest: A CT scan in someone with emphysema may show small pockets of air throughout the lung.