Microeconomics 18th Edition by Campbell McConnell, Stanley Brue, Sean Flynn

Exercise 6

Explain the following statement, using the MB curve in Figure 16.6 to illustrate: "The optimal amount of pollution abatement for some substances, say, water from storm drains, is very low; the optimal amount of abatement for other substances, say, cyanide poison, is close to 100 percent."
Reference Figure 16.6