Final answer:
The smallest whole dollar tax on each ton of smoke emitted that will guarantee total emissions fall to 2 tons per day will be $2.
Step-by-step explanation:
In order to reduce total emissions down to 2 tons of smoke per day, the city council sets a tax of $t per day on each ton of smoke emitted. The smallest whole dollar tax on each ton of smoke emitted that will guarantee total emissions fall to 2 tons per day will be $2. The firms will choose to reduce pollutants until the marginal cost of reducing pollution is equal to the pollution tax.
Assuming the revenue collected from taxing emissions is used to offset other taxes, the total cost to society of this policy would be the revenue collected from the tax minus the reduction in pollution damage.
The primary topic of this question is pollution taxation and its impact on reducing emissions.