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.
Biogeochemistry includes the history of the great carbon reservoirs in the crust of the Earth, like limestone rocks and the coal deposits, as well as the distribution of nitrate and phosphate in the ocean.
Carbon is found in the non-living part of the hydrosphere, atmosphere, and geosphere as: 1  carbonate (CaCO 3) rocks: limestone and coral. 2  dead organic matter, such as humus in soil. 3  fossil fuels from dead organic matter (coal, oil, natural gas). 4  carbon dioxide (CO 2) in the air.