The use of land, such as agricultural and forest land types, as areas for carbon sequestration. In the case of forests, they can provide a variety of benefits to both man and nature by supplying much of the planet’s oxygen while storing carbon, which as a greenhouse gas contributes to global warming. Methods that can increase the potential for sequestration include afforestation, the conversion of open land to forest land, reforestation, and forest preservation. Increasing the potential of agricultural lands for carbon storage involves a change in land-use and management practices. For example, conservation tillage leaves a minimum of 30 percent crop residue on the soil after planting, disturbs the soil less, and increases the amount of carbon that can accumulate in the soil.