The U.S. government currently owns dams, railroads, numerous resources, and

An "externality" occurs when

a. environmentalists protest. b. pollution is controlled by bringing in outside people and technology. c. a firm imposes unwanted costs on others. d. the economy is weak.

How do the powers of the upper and lower houses differ in most of the world’s legislatures?

a. The upper house is more powerful. b. The lower house is more powerful. c. The powers of the houses are roughly equal. d. The powers of each house generally depend on the kind of policy issue in question.