| A | B |
|---|
| urbanization | the growth of cities as people move from rural to urban areas |
| infrastructure | all of the things a society builds for public use |
| urban crisis | lack of adequate infrastructure in overpopulated cities |
| suburban sprawl | developments that spread out around cities |
| land-use planning | determining in advance where people will live |
| deforestation | clearing trees from an area without replacing them |
| clear-cutting | removing all of the trees from a land area |
| selective-cutting | removing only middle-aged or mature trees from an area |
| reforestation | the processing of replacing trees that have died or been cut down |
| overgrazing | when animals stay in an area too long and the grass is damaged beyond its ability to recover |
| reclamation | a process in which mined land is restored to the condition it was before mining |
| wilderness | area in which the land and its ecosystems are protected from all development |
| open-pit mining | machines dig large holes in the ground and remove ore |
| strip-mining | large areas of the Earth's surface is cleared away to obtain ore |
| desertification | process converting rangeland to wasteland |
