Across
- 4. A farming technique whereplants are burned
- 5. The cutting down of too many trees
- 6. A nomadic Arab of the desert
- 7. a grassy plain in tropical and subtropical region
Down
- 1. Spreading of desert land
- 2. provides enough food for the farmer but not enough for sale
- 3. A dry arid semi-arid region south of the Sahara