Pollution and the social Optimum Price of Cost of Social cost Aluminum pollution Supply (private cost) Optimum Equilibrium Demand private value) 0 Quantity of optimum MARKe Aluminum TQMARKE T Pollution and the Social Optimum... Quantity of Aluminum 0 Price of Aluminum Demand (private value) Supply (private cost) Social cost Qoptimum Cost of pollution Equilibrium Optimum