Mitigation of atmospheric CO2 concentrations by increased carbon sequestration in the soil

Abstract

 The International Panel on Climate Change distinguished three main options for the mitigation of atmospheric CO₂ concentrations by the agricultural sector: (1) reduction of agriculture-related emissions, (2) creation and strengthening of C sinks in the soil, and (3) production of biofuels to replace fossil fuels. Options for sustained sequestration of C in the soil through adapted management of land resources are reviewed in the context of the ongoing discussion on the need to reduce greenhouse gas concentrations in the atmosphere. Enhanced sequestration of atmospheric CO₂ in the soil, ultimately as stable humus, may well prove a more lasting solution than (temporarily) sequestering CO₂ in the standing biomass through reforestation and afforestation. Such actions will also help to reverse processes of land degradation, thus contributing to sustained food productivity and security for the people in the regions concerned.