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.
Though only a small amount of the atmosphere is made of CO2, this is still a huge amount in weight and volume. It is reasonable to wonder what the major sources are. The greatest amount of carbon dioxide is locked up in plants, rocks, and the oceans. It should not be surprising that these each contribute more CO2 emissions than any other sources.