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 stored in four main reservoirs. 1  In the atmosphere as CO2 gas. 2  In the hydrosphere (oceans and surface waters) as dissolved CO2. 3  In the biosphere where it occurs as organic compounds in organisms. 4  In the Earth's lithosphere as carbonate minerals, graphite, coal, petroleum.