3. How do the marginal costs of pollution reduction and the marginal costs of pollution damage change as pollution levels increase? The marginal costs of pollution reduction remain constant and the marginal costs of pollution increase b. The marginal costs of pollution reduction increase and the marginal costs of pollution damage increase C. The marginal costs of pollution reduction increase and the marginal costs of pollution damage decrease d. The marginal costs of pollution reduction decrease and the marginal costs of pollution damage increase a. e. The marginal costs of pollution reduction decrease and the marginal costs of pollution damage decrease