Which among the following is the largest terrestrial pool of carbon?

Answer: [C] Soil

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.

This question is a part of GKToday's Integrated IAS General Studies Module