| A | B |
|---|
| Commute | To travel to work |
| Megalopolis | A number of cities and suburbs that blend into one very large urban area |
| population density | the average number of people per square mile |
| petrochemical | a substance such as plastic or paint that is made from petroleum |
| Sun Belt | an area of United States stretching from the southern Atlantic coast to the California coast |
| mixed-crop farm | a farm that grows several different |
| recession | a decline in business activity and economic prosperity |
| Corporate farm | a large farm that is run by a corporation, or an agricultural company |
| forty-niner | the nickname for a miner who took part in the California Gold Rush of 1849 |
| responsible development | balancing the needs of the environment, community, and economy |
| mass transit | a system of subways, buses, and commuter trains used to transport large numbers of people |
