Haiti was once a heavily forested country. today, 80 percent of haiti's forests have been cut down, primarily to be burned to create charcoal. the reduction in the number of trees has lead to devastating floods when it rains heavily. this is an example of the tragedy of the commons. the consequences of not having a market economic system. human greed. tragic externalities.

How does specialization enable countries to trade with one another? a country can make and sell goods affordably and buy goods that it is inefficient at making. a country can make what it chooses and sell its goods to other countries. a country can decide to buy everything it needs from other countries. a country can efficiently make goods that were once difficult to make.

The provisions of subpart d, of the hhs regulations, additional protections for children involved as subjects in research apply to: all research involving childrenall research that is > minimal riskall research funded by any federal agencyall research funded by hhs

Why do all market economies have taxes to support armed forces police forces public schools and at least some form of public transportation?