| A | B |
|---|
| Amazon River | The world's largest river system flowing east across northern Brazil. |
| Rio de la Plata | An estuary created by the flow of the Parana River into the Atlantic Ocean. |
| estuary | A partially enclosed body of water where freshwater mixes with salty water. |
| Pampas | In central Argentina, these are wide grassy plains. |
| Patagonia | A region of dry plains and plateaus south of the Pampas. |
| deforestation | The clearing of trees. |
| soil exhaustion | Soil that has become infertile due to the planting of the same crop year after year. |
| Sao Paulo | The largest urban area in South America and the 5th largest city in the world. |
| megacity | A giant urban area including surrounding cities and suburbs. |
| favelas | Hugh slums in the southeastern cities of Brazil. |
| gauchos | Argentine cowboys. |
| Buenos Aries | Argentina's capital city. |
| mercosur | An organization pormoting trade and economic cooperation among the southern and eastern countries of South America. |
| informal economy | A part of the economy based on odd jobs people perform without government regulation through taxes. |
| landlocked | To be completely surrounded by land with no direct access to the ocean. |
