In the first years following the passage of the Clean Air Act in 1970, air pollution declined sharply, and there were important health benefits, including a decline in infant mortality. According to an article in the Economist magazine, however, recently some policymakers worry that the EPA is constantly tightening restrictions on pollution, at ever higher cost to business but with diminishing returns in terms of public Source: Soaring EconomistJune 2, 2011 Additional reductions in pution might come at ever higher cose because
A as pollution is reduced the cost of producing goods increases
B. the marginal cost of additional pollution reduction falls as there is less pollution to reduce
C. there are penalties charged for pollution
D themginal cost of additional pollution reduction rises as there is less pollution to reduce
