Deforestation

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Across
  1. 6. A crack in the earth's crust
  2. 7. Extracting minerals from the ground
  3. 9. The decomposition of plant remains
  4. 11. Fuel that comes from plants and animals
  5. 14. The act of cutting down trees and causing erosion
  6. 16. An igneous rock layer that forms when magma hardens on the earth&g
  7. 17. movement of people from urban areas to cities
  8. 19. Farming
  9. 20. How light reflects off a mineral
Down
  1. 1. Constructing a man-made habitat
  2. 2. Going inside the earth in the hope of finding petroleum
  3. 3. Reduce the s amount of damage from mining
  4. 4. Mineral's ability to split
  5. 5. A spontaneous process in which unstable nuclei lose energy
  6. 8. A principle that states the younger rock lies on top of older rock
  7. 10. Naturally occurring substance
  8. 12. The color of a mineral in powder form
  9. 13. A shift from farming to factories in an economy
  10. 15. Mineral's ability to split along a jagged surface
  11. 18. A machine that produces power