The graph plots society's M B and M C of pollution abatement versus amount of pollution abatement.The amount of pollution abatement is plotted horizontally, with amounts rising from Q 1 to Q 4. The vertical axis is labeled society's M B and M C of pollution abatement. The graph shows two rising curves labeled M C 1 and M C 2 and two falling curves labeled M B 1 and M B 2. M B 2 lies above M B 1 and M C 2 lies to the right of M C 1. The falling curves start at two different points on the top left and end at two different points on the bottom right. The rising curves start at two different points on the bottom left and end at two different points on the top right. M B 1 and M C 1 intersect at Q 1. M B 2 and M C 1 intersect at Q 2. M B 1 and M C 2 intersect at Q 3. M B 2 and M C 2 intersect at Q 4. In the diagram, the MB curve slopes downward because Multiple Choice the more pollution society reduces the lower the