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

Acity developer is considering building an amusement park near a local river. what tool would the developer predict the future path of the river? a. series of city maps from nearby cities b. series of topographic maps in chronological order c. guide map of the new amusement park d. thermal map of the area

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

What is the famous rainforest in costa rica called?