The NREL life cycle inventory database contains information about the manufacture of phosphate fertilizer, which quantifies the demand for the air quality regulation ecosystem service in the form of SO₂ emissions. To produce 1 kg of phosphate fertilizer, 5.53 x 10^-3 kg SO₂ is emitted. However, information about the supply of this ecosystem service is not available in this inventory, which may be specific to the phosphate fertilizer manufacturing site. From the National Emissions Inventory database, a phosphate manufacturing facility is found to be located in Illinois. Using the current forest cover recorded in the National Land Cover Database, the capacity of the site for taking up emissions is 2.51 x 10^-3 kg SO₂/kg fertilizer. Calculate the TES sustainability metric v_k for the ecosystem service of mitigating SO₂ emissions at this site. If land is restored, the capacity of the site for taking up emissions is increased to 5.44 x 10^-3 kg S0₂/kg fertilizer; what will be the value of v_k?