Which of the following is a public good?
A) Air traffic control.
B) National defense.
C) Clean air.
D) All of these.

Question

Quizplus · Accepted Answer

All of these are examples of public goods. Public goods are goods or services that are both non-excludable, meaning that it is not possible to exclude someone from using them, and non-rivalrous, meaning that one person's use of the good does not diminish the availability of the good for others. Air traffic control, national defense, and clean air are all public goods because they benefit everyone and are not diminished by individual use.

Which of the Following Is a Public Good