Twenty strategies to stabilize atmospheric CO2 level are examined. Controlling the rate of CO2 emissions first, by modest conservation and increased use of methane, is feasible; it costs little and provides a stable base for other action. Projections of CO2 level up to the year 2100, with and without emission stabilization, make good back-drops for quantifying other controls. No method studied can control CO2 level by limiting CO2 output; failures are economic, ecological, or due to lack of effect. Assessments are tabulated; some are plotted.Anthropogenic Peat takes a different approach: Biomass grown to remove CO2 from the air is digested to methane and organic residue; the residue is buried as AP to control CO2 level and methane becomes a renewable fuel. AP can control CO2 level at current fuel prices; as fossil fuel displacement is not required, no disruption of economies need take place. A detailed example is given.