In 2012, administrative assistants averaged $33,560 a year, according to the Bureau of Labor Statistics. But this figure accounts for all administrative support, regardless of employer.Those working for dental offices averaged closer to $35,020.With training as a medical secretary, administrators working in dental offices can expect even higher salaries, at an average of $36,960.hose working for dental offices averaged closer to $35,020. With training as a medical secretary, administrators working in dental offices can expect even higher salaries, at an average of $36,960.
Human Sources of Sulfur Oxides; Wood Smoke; Contributors; It has been estimated that on a global basis, natural sources, such as volcanoes, contribute about as the same amount of sulfur oxides to the atmosphere as human industrial activities. This amounts to 75-100 million tons from each source per year. However, in industrial countries such as in Europe and North America, human activities contribute 95 % of the sulfur oxides and natural sources only 5 %. In the Western States, natural sources of sulfur oxides may be more important.
Sulfur dioxide (SO 2) is a colorless reactive gaseous air pollutant with a pungent odor. This gas can pose a threat to human health, animal health, and plant life.The primary sources of sulfur dioxide emissions are from fossil fuel combustion and natural volcanic activity. People with lung diseases, such as asthma, chronic bronchitis, and emphysema will generally experience more serious health effects at lower SO 2 levels. 2  Children are at higher risk from SO 2 exposure because they are more likely to have asthma, which may be aggravated by SO 2 exposure.