Across
- 2. the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture
- 5. the breeding, rearing, and harvesting of fish, shellfish, algae, and other organisms in all types of water environments
- 10. the ability to be maintained at a certain rate or level
- 11. statistical data relating to the population and particular groups within it
- 13. the process of making an area more urban
- 14. a component of biodiversity that generally concerns the range of things that organisms do in communities and ecosystems
- 15. a form of mining in which the soil and the rock covering the mineral deposits are removed
- 16. the cultivation of waste land or land formerly under water
- 20. materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain
- 24. the variety of life in the world or in a particular habitat or ecosystem
- 27. an estimate of the average number of children born to each female in her childbearing years
- 28. the impact of a person or community on the environment, expressed as the amount of land required to sustain their use of natural resource
- 29. an urban area in which it is difficult to buy affordable or good-quality fresh food
- 30. the gradual caving in or sinking of an area of land
Down
- 1. the concentration of toxins in an organism as a result of its ingesting other plants or animals in which the toxins are more widely disbursed
- 3. the ratio of the number of deaths in the year to the average total population of the year
- 4. occurs when human activity introduces increased amounts of these nutrients, which speed up plant growth and eventually choke the lake of all of its animal life
- 6. the process of removing salt from seawater
- 7. the variety of different habitats, communities and ecological processes
- 8. placer mining is the mining of stream bed deposits for minerals
- 9. a rise in the temperature of rivers or lakes that is injurious to water-dwelling life and is caused by the disposal of heated industrial waste water
- 12. the use of living organisms to suppress pest populations, making them less damaging than they would otherwise be
- 17. mining beneath the surface of the earth
- 18. an area or ridge of land that separates waters flowing to different rivers, basins, or seas
- 19. the range of different inherited traits within a species
- 21. the average period that a person may expect to live
- 22. any positive benefit that wildlife or ecosystems provide to people
- 23. any land capable of being ploughed and used to grow crops
- 25. the natural resources and environmental features in a given area, regarded as having economic value or providing a service to humankind
- 26. safe to drink; drinkable