Refer to Figure 4. 2 in the textbook. This graph demonstrates that the marginal pollution-damage cost (MDC)

Question:

Refer to Figure 4. 2 in the textbook. This graph demonstrates that the marginal pollution-damage cost (MDC) of each successive unit of pollution is incrementally rising at an increasing rate. What ecological factor is said to explain this phenomenon? Be specific.

Data from Figure 4. 2