Reforestation costs are modelled in this data-file, acquiring pastureland, planting new forests to absorb CO2, over a 50-year cycle. As a good rule of thumb, we think $50/ton CO2 prices, $50/m3 timber, and 3% pa land appreciation will unlock an 8% unlevered IRR at Yield Class 16 (5 tons of CO2 per acre per year). CO2 price sensitivities range from $0 to $100/ton.