17. Why do issues of pollution and radiation (Chernobyl) usually involve more than one country? * a. the euro can be used to pay for the clean up
b. pollution spreads across national boundaries
c. cleanup is the responsibility of the United Nations
d. individuals refuse to obey national laws

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare