Sore throat is a symptom, not a disease. In each case, there was a different cause that dictated a different treatment. The scratchy throat probably was a mechanical problem caused by dry, heated winter air and aggravated by my friend's tendency to breathe through her mouth when she sleeps.
Definition. Carbon-storing natural feature (such as a forest or the land mass) that exchanges carbon with other reservoirs. A reservoir from which no outflow of carbon compounds takes place is called carbon sink.
The above figure depicts the different components of the carbon cycle, with values in parentheses shown as estimates of the major global carbon reservoirs (Houghton, 2007) in gigatons (GT) (Source: U.S. Department of Energy Office of Science).