| A | B |
|---|
| Pittsburgh | the "steel city" |
| trade | buying and selling goods |
| transportation | moving things from place to place |
| mills | factories that make steel |
| freight trains | trains that carry goods |
| passenger trains | trains that carry people who are traveling |
| irrigation | bring water to dry land |
| agriculture | the business of farming |
| Amtrak | the passenger trains in the U.S. |
| bullet train | a very fast train used in Europe and Japan |
| fertilizer | makes plants grow stronger and more quickly |
| San Joaquin Valley | place where many fruits and vegetables are raised |
| cotton | a non-food crop grown in the San Joaquin Valley |
| almond | kind of nut grown in San Joaquin Valley |
| airplane | most expensive type of transportation |
| train | type of transportation that can carry the most goods |
| truck | type of transportation that can go right to the store |
| barge | large flat-bottomed boat for transporting heavy goods |
| coal | used to fuel the steel furnaces |
| climate | the weather of an area throughout the year |
| automobile | replaced trains for many travelers because it can go anywhere at anytime |
| California | state where San Joaquin Valley is located |
| Canada | does more trade with U.S. than any other country |
| air pollution | problem caused by many steel mills in Pittsburgh |
| services | types of businesses that supply people with things they need to live |
| exports | products a country sells to another country |
| imports | products a country buys from another country |
| international trade | buying and selling of products among countries |
