Short-term dynamics of the global carbon cycle is closely related to the concept of climate system: the totality of the atmosphere, hydrosphere, biosphere, and their interactions. Human activities have been substantially increasing the concentrations of carbon dioxide and other greenhouse gases in the atmosphere and thus inducing potentially adverse changes in the climate system. This tendency has become of public concern that led to the United Nations Framework Convention on Climate Change (UNFCCC). This convention suggests protection of carbon pools, enhancement of carbon sinks, and reduction of emissions from carbon sources.
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