Hydroelectric dams use waterpower to generate electricity. The Itaipu Dam on the Parana River is a $20-billion joint project between Brazil and Paraguay completed in
1984. It generates the second most energy of all hydroelectric plants in the world
providing electricity to citizens.
14. What conclusion can be drawn from the information above?
A. There will be problems between Brazil and Paraguay over the amount of water
needed.
B. The dam will cause flooding in Brazil and drought conditions in Paraguay.
C. Brazilians and Paraguayans have modified their environment to meet their needs,
D. The Itaipu Dam will supply power only to Paraguay.

Migration the ability to meet current needs without reducing the ability to meet future needs 2. immigration the leaving of one's homeland to settle in a new place 3. migration a situation in which the birth rate is not sufficient to replace the existing population 4. overpopulation the movement of people to a new country 5. sustainable development the increase in the population of a city 6. underpopulation a situation in which resources are being used up at a faster rate than they can be replenished 7. unsustainable development a situation in which the number of people exceeds the available natural resources in an area 8. urbanization the movement of people from one place to another