Certified in Public Health (CPH) Practice Exam

What substance was banned as a result of public concern over environmental pollution highlighted by "Silent Spring"?

1. Chlorofluorocarbon (CFC) refrigerant gases

2. Leaded gasoline

3. DDT pesticide

4. Asbestos insulation materials

The correct answer is: DDT pesticide

The substance associated with significant public concern over environmental pollution as highlighted in "Silent Spring" by Rachel Carson is the pesticide DDT. This book, published in 1962, raised awareness about the harmful effects of DDT on the environment, particularly its impact on bird populations. Carson's compelling narrative brought to light the idea that pesticides could harm not only the target pests but also other wildlife, consequently affecting entire ecosystems. As a result of the increasing public outcry for ecological protection and awareness raised by Carson’s work, DDT was eventually banned in many countries, including the United States in 1972. This ban was a direct response to the environmental damage and health concerns associated with DDT and reinforced the need for careful consideration of human activities on nature. The remaining options, while relevant substances in their own contexts, do not specifically relate to the themes raised in "Silent Spring." Chlorofluorocarbons were more prominently addressed in later environmental discussions concerning ozone depletion, leaded gasoline was focused on issues of air quality and health impacts, and asbestos discussions were primarily around health concerns tied to occupational exposure rather than environmental concerns highlighted in Carson's influential work.