Select a specific impediment to a global policy that might mitigate the consequences of global warming:

a. The costs and benefits of such a policy would be unevenly distributed across many nations.
b. Nations that have become wealthy should not be unfairly charged to prevent future emissions.
c. Poor nations can best afford the cost of reducing emissions if their IMF debt were forgiven.
d. Only large winning coalition nations have an interest in public good emissions reduction

Ans: a