| A | B |
|---|
| population | the number of people who live in a place |
| irrigation | bringing water to fields |
| capital | the center of an area's government |
| air pollution | dirt and chemicals in the air that can harm people |
| climate | the kind of weather a place has over a long time |
| Chinese farmers | live in a village AWAY FROM their fields |
| rice | crop grown in China that the people eat at almost every meal |
| things needed for growing rice | good soil, flat land, lots of water |
| Tenochtitlan | Aztec capital - near the center of their land |
| mountains | trap the air pollution in Mexico City so it can't blow away |
| subways | will help Mexico City's air pollution to decrease |
| Aztecs | first people to settle where Mexico City is today |
| Spain | the country that captured Tenochtitlan almost 500 years ago |
| Xiashen's problems | few jobs, not much to do for fun |
| Xiashen's benefits | no pollution, good farm land, peaceful and quiet |
| Mexico City's problems | lots of pollution, crowded, noisy, lots of traffic |
| Mexico City's benefits | lots of jobs, many things to do for fun, good colleges and universities |
