Please help me solve these multiple choice problems.

15. A pollution tax would be preferable to a system of transferable permits when. . . The marginal benets of abatement are steep, and the marginal costs of abatement reduction are relatively stable The marginal benets of abatement are steep, and the marginal costs of abatement reduction are steep The marginal benets of abatement are relatively stable, and the marginal costs of pollution abatement are relatively stable The marginal benets of abatement are relatively stable, and the marginal costs of pollution abatement are steep The marginal benets of abatement are elastic, and the marginal costs of pollution abatement are also elastic 16. For a pollutant like lead, which causes health effects to residents even at very low levels, which regulatory approach would be most effective for eliminating any health threats? 999375 Emissions standards Tradable permits Pollution taxes Pollution subsidies Ecolabeling 17. The main disadvantage of an emissions taxis that... EDP-'93?!\" The total pollution reduction from an emissions tax cannot be known for sure Firms lack the exibility to pursue different technologies Firms do not have an incentive to reduce pollution Firms cannot behave in an economically efcient manner Differences among firms are not incorporated into the policy 1 8. Market-based regulations tend to work best with pollutants that... 9999'?\" Are non-uniformly mixed and local in effect Have threshold effects Are uniformly mixed and regional in effect Cause non-point source pollution Have non-linear and local effects 19. Which one of the following statements is false? a. Technological progress will lower the price of tradable pollution permits b. Under a pollution tax, technological progress will reduce overall pollution levels 9 51' Under a system of tradable permits, technical progress will reduce overall pollution levels A pollution tax creates an incentive for technological progress Under a system of tradable permits, technological progress can result in some rms increasing their pollution levels