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Refer back to Table 10.4 of the marginal benefitTABLE 10.4 Portney’s Benefit-Cost Analysis of the 1990 CAAAAcidicUrban AirHazardous AirDepositionQualityPollutants[Title IV)(Titles II and V)AggregateAggregate[Title III)RangePoint EstimateAnnual Marginal$4$19-$22$6-$10Costs$29-$36$32Annual Marginal$2-$9$4-$12SO-$4$6-$25Benefits$14NOTE: All values are stated in billions of 1920 dollarsSource: Boost on Fortney (1990he