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.
Rainforests are one of the world's primary carbon reservoirs. By absorbing carbon dioxide from the air, storing the carbon and giving us oxygen to breathe, tropical forests act as the Earth's thermostat, regulating temperatures and weather patterns.