Elephants are endangered, but cows are not because
a. cows are not as valuable as elephants.
b. elephants are a common resource, while cows are private goods.
c. cows are a common resource, while elephants are private goods.
d. it is legal to kill cows but not elephants.
b
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Comparative advantage indicates that:
a. specialization and exchange will cause trading partners to reduce their joint output. b. a nation can gain from trade even when it is at an absolute disadvantage in producing all goods. c. trade with low-wage countries will pull down the wages of workers in high-wage countries. d. all of these.
The amount of land covered by forests is:
A. declining in all nations. B. increasing in all nations. C. increasing in places like the United States and Western Europe, while declining in countries in South and Central America. D. declining in places like the United States and Western Europe, while increasing in countries in South and Central America.