2. Marginal - To tie or hold things tightly together.

3. Semi-arid - Became worse in condition or quality.

4. Occupy - A dry climate with little rainfall, but not as dry as a desert.

5. Crept - The activity of keeping bees to produce honey.

6. Southwards - Very serious or extreme.

7. Deteriorated - Able to produce crops or plants easily.

8. Prolonged - Possible to stop from happening.

9. Severe - Lasting for a long time.

10. Desertification - To live in, use, or take control of a place.

11. Overgrazing - The gradual wearing away of soil or rock by wind, water, or ice.

12. Overcultivation - In the direction of the south.

13. Soil - Moved slowly and quietly, often close to the ground.

14. Tree roots - Land that is not very useful or productive for farming.

15. Bind - The uppermost layer of soil, rich in nutrients.

16. Erosion - The top layer of earth where plants grow.

17. Topsoil - The process by which fertile land becomes desert.

18. Bare rock - A substance used for washing and cleaning.

19. Dust - When crops are grown too much on the same land, making the soil poor.

20. Irreversible - Able to work successfully or survive; practical and possible.

21. Preventable - The underground part of a tree that takes in water and nutrients.

22. Soap - Tiny dry particles of dirt.

23. Beekeeping - Cannot be changed back to the way it was before.

24. Viable - When too many animals eat grass from the same land, damaging it.