Understanding the origins of pollution is the first step toward considering policies for r...

Understanding the origins of pollution is the first step toward considering policies for reducing it. The chapter you have just read includes several graphs displaying pollution data. The following questions ask you to think more about the sources of this pollution:

Figure 18.10 shows a group of less common—but still significant—organic contaminants in surface waters. What do you think are the most likely sources of these chemicals?