This chapter reviews the potential to manage present and potential forest lands capable of supporting tree cover to conserve and sequester C. Forest management here includes the array of practices, in native forests and on non-forested lands, such as protection, forestation (afforestation and reforestation), intermediate silviculture treatments (e.g., thinning, fertilization), harvesting, and agroforestry that promote sustained production of goods and services. These promising forestry practices are considered in arriving at national, regional, and global estimates of forest sector potential for mitigating the accumulation of primarily CO2, and to some degree other GHGs, in the atmosphere.