In a new RFF discussion paper, “Valuation of Ecosystem Services in the Southern Appalachian Mountains,” RFF colleagues Dallas Burtraw, Alan Krupnick, and Juha Siikamäki and I, along with Susie Chung Criscimagna of Eden Housing, Bernard Cosby of the University of Virginia, and David Evans of EPA, estimate the monetary value of reducing acidity in the southern Appalachian region. Our estimates were based on the stated preference method, which allowed us to survey households about their willingness to pay (WTP) for the restoration of ecosystem services in the region. Based on their answers, we determined that households across the region would be willing to pay $15.67 per year each—or about $208 million in total—to restore the environment of the southern Appalachians to a healthy state. Aggregated and discounted into the future, and allowing for a 50-year delay for the ecosystems to recover, these annual values come to a present value of $3.7 billion. Yet it’s worth noting that these ecosystem service benefits still pale in comparison to the total economic benefits of reducing air pollution, which stem overwhelmingly from public health.