Which among the following is the largest terrestrial pool of carbon?
Soil carbon refers to the carbon held within the soil, mainly as organic content. Soil carbon is the largest terrestrial pool of carbon (2,200 Gigatonnes). Soil carbon plays a key role in the carbon cycle and thus is important in global climate models. It has been shown that 1 kg of carbon released from the soil constitutes 3.64 kg of CO2 in the atmosphere. The exchange of carbon between soils and the atmosphere is a significant part of the world carbon cycle, which is extensive both spatially and temporally. Carbon, as it relates to the organic matter of soils, is a major component of soil and catchment health. With reference to Carbon sequestration, the soil is one of the largest reservoirs, where carbon could be restored.
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