| A | B |
|---|
| arable | suitable for growing crops |
| deforestation | The removal of trees faster than forests can replace themselves. |
| desertification | The process by which fertile land becomes desert |
| diversity | difference |
| extinction | disappearance of a species from all parts of its geographical range |
| Green Line | the place where the cultivated land ends and the desert begins |
| North Africa | an area of northern Africa between the Sahara and the Mediterranean Sea; Algeria |
| oasis | a small fertile or green area in a desert region |
| overgrazed | when grass is consumed by animals at a faster rate than it can regrow. |
| rainforest | a dense evergreen forest |
| reforestation | the restoration (replanting) of a forest that had been reduced by fire or cutting |
| sahel | a strip of dry grasslands on the southern border of the Sahara; also known as "the shore of the desert" |
| savanna | an area of tall grassland with scattered trees and bushes |
| steppe | partly dry grassland often found on the edges of a desert. |
| sub-sahara | area of Africa that lies below the Sahara Desert (the lower 2/3 of Africa) |
| tropical rainforest | biome near the equator with warm climate wet weather and lush plant growth. |
| tuareg | Desert nomads who live in small groups throughout the central and south Sahara. |
| nomad | A member of a group that has no permanent home |
| subsistence farming | farming in which only enough food to feed one's family is produced |
| soil erosion | Movement of soil components |
