Across
- 2. the decline in soil quality caused by erosion, nutrient loss, salinity or pollution.
- 4. mountain ranges that affect climate by influencing temperature, wind and rainfall patterns. Mountains can cause orographic rainfall and rain shadows.
- 5. the plant life of a particular area.
- 8. the variety of life in a particular area or biome.
- 9. reliable access to sufficient, safe and nutritious food for all people.
- 12. when livestock eat vegetation faster than it can regrow, causing environmental damage.
- 13. the removal of topsoil by wind, water or human activities.
- 14. deforesting an area to make way for a different land use.
- 15. the process of growing the same crop in the same location year after year until the soil is depleted and less productive.
- 17. the loss of natural environments that plants and animals depend on for survival.
- 18. the distance north or south of the Equator. Places closer to the Equator generally have warmer climates.
- 19. the replanting of trees in areas that have been cleared.
- 20. a large ecosystem characterised by similar climate, vegetation and animal life.
Down
- 1. large movements of ocean water that warm or cool nearby coastal areas, influencing temperature and rainfall.
- 3. the height of a place above sea level. As altitude increases, temperature decreases.
- 6. the decline in the quality and productivity of land due to human activities.
- 7. meeting current needs without compromising the ability of future generations to meet their own needs.
- 10. the artificial supply of water to dry land to help in the growing of crops.
- 11. the average weather conditions of a place over a long period of time (usually 30 years or more).
- 16. the cutting down of trees and other plant life in a forest.