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.
In some cases, the carbon may remain in a reservoir for millions of years, as in the case of fossil fuels before the Industrial Revolution. As humans burn fossil fuels to produce energy and as they clear natural ecosystems, carbon dioxide is released into the atmosphere, where it acts as a greenhouse gas.