Across
- 5. planting and cultivating of new trees
- 8. electricity produced by natural underground sources of steam
- 9. method of farming that involves cutting down trees and underbrush and bruning the area
- 10. raising of animals for food
- 11. precipitation carrying large amounts of dissolved acids
- 13. changes in the factors used to measure the condition of the atmosphere over
- 16. land flooded with water permanently or seasonally
- 18. to give support to
- 20. materials or substances that occur in nature
- 24. complex community of living things and the physical environment
- 25. sudden and extreme even in a nature
- 27. act of protecting Earth's natural resources
- 30. haze caused by chemical fumes from pollution
- 31. forbid somebody from doing something through law or rule
- 32. resource that can't be replaced
- 33. growing large quantities of crops or livestock to sell for a profit
- 36. low lying area from which seawater has been drained to create a new land
- 37. set of things in order
- 38. the loss or destruction of forests
Down
- 1. wide variety of life on Earth
- 2. permanently frozen layer of soil beneath the surface of the ground
- 3. idea of creating conditions where all natural resources are available today and for future generations
- 4. located in the far northern regions of Earth
- 6. plants or animals that ride along with water currents
- 7. farming that only provides the basic needs of a family
- 12. process of collecting and moving water for use in agriculture
- 14. to withdraw
- 15. resources that can be replenished in a short period of time
- 17. energy created by splitting the nucleus of an atom
- 19. electricity that is created by water
- 21. rich soil made up of sand and mud deposited by running water
- 22. area turns into a desert
- 23. removal of salt from seawater to make it useable for drinking and farming
- 26. removal of all trees in a stand of timber
- 28. to regain
- 29. fuel resource formed in the Earth by plant and animal remains
- 30. change the place, position, or direction of
- 34. blocks out many of the most harmful rays from the sun
- 35. boundary where a higher, upland area drops to the lower land of a plain
