advantages: coal is plentiful and energy dense, technological demands for surface mining are small and costs are low; oil is convenient to transport/use, energy dense, burns cleaner than coal and is more CO2 efficient than coal; natural gas contains fewer impurities than coal and oil and releases 60% as much CO2 as coal does.
Which of the following conditions is most likely directly linked to tobacco use? A. influenza B. lung cancer C. pneumonia D. diabetes. Lung cancer is most likely directly linked to tobacco use.
Other tobacco-related conditions of the mouth include: 1  Brown to blackish staining of teeth, dentures and dental restorations. 2  Increased risk of leukoplakia (a lesion in the mouth which can develop into cancer). 3  Increased risk of tooth decay and tooth loss. 4  Bad breath (halitosis) and impaired taste.