Evidence exists that countries with the most open economies tend to have more stringent environmental regulations

A sales tax applied to a foreign good or service is known as a(n)

a. progressive tax b. unit tax c. excise tax d. external tax e. customs duty

During recent years, Green Revolution scientists have

a. focused on techniques of organic farming b. focused primarily on developing new strains of wheat and corn c. produced seeds for a greater variety of crops d. engaged in little activity since their funding has been cut off e. focused on political issues of agriculture in developing countries