Environmental Review

12345678910
Across
  1. 1. the variety of species living within an ecosystem
  2. 3. a unit of surface area equal to 100 ares
  3. 4. the depletion of shared resources by people acting in individual interest
  4. 5. the buildup of salts in surface soil layers
  5. 7. when the response to a stimulus increases the original stimulus
  6. 8. the area of land where all of the water that is under it or drains off of it goes into the same place
  7. 10. the process by which nitrites and nitrates are produced by bacteria in the soil
Down
  1. 2. species that serve as early warnings that an ecosystem is being damaged
  2. 6. the status of an organism within its environment and community
  3. 9. a form of tourism that supports the conservation and sustainable development of ecological areas