The efficient level of pollution:
A.	is usually zero.
B.	will usually be some amount greater than zero.
C.	occurs when marginal cost and marginal benefit are equal.
D.	occurs when marginal social cost is less than marginal social benefit.
Answer:B
The efficient level of pollution:
A.	is usually zero. B.	will usually be some amount greater than zero. C.	occurs when marginal cost and marginal benefit are equal. D.	occurs when marginal social cost is less than marginal social benefit.