Suppose the marginal abatement cost of reducing CO₂ emissions is given by the equation MAC=60-2e and the marginal damage from emissions is given by the equation MD=12+10e.

19. The initial uncontrolled level of emissions in the economy is ____________________.

20. The total dollar amount of damages at the initial uncontrolled level of emissions is $_____________.

21. The efficient level of emissions in the economy is ___________________.

22. What are the total abatement costs of achieving the efficient level of emissions? $_________________

23. What are the net social benefits of reducing emissions from the initial uncontrolled level to the efficient level? $________________________

Now suppose the marginal damage curve increases to MD=63+10e.

24.The new efficient level of emissions will be __________________.