UMass RESEC 262 Summer 1) The Clean Air Act requires the EPA to set these standards "requisite to protect the public health" with "an adequate margin of safety." This has been referred to as zero-risk standards. Use the graph below to answer the questions below concerning the economics of zero-risk ambient concentration standards. Aggregate marginal abatement costs A¹ A² A³ Aggregate marginal damage A4 Problem A5 Ambient concentration a. What is the maximum ambient concentration in the graph that would achieve the zero-risk goal? [1 point] b. Is a zero-risk ambient concentration standard likely to be efficient? Why? [2 point]

Fig: 1