Environment science

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Across
  1. 1. Branch of biology dealing with interactions among organisms and their environment.
  2. 3. Maximum population size of the species that the environment can sustain indefinitely.
  3. 8. Tourism directed towards exotic, often threatened, natural environments.
  4. 10. Biogeochemical cycle that transforms nitrogen and nitrogen-containing compounds.
  5. 11. Increase in the proportion of people living in urban areas.
  6. 13. Process by which moisture is carried through plants from roots to small pores on the underside of leaves.
  7. 14. Substance capable of causing cancer in living tissue.
  8. 15. Species at risk of extinction.
  9. 16. Thick subsurface layer of soil that remains frozen throughout the year.
  10. 19. Process by which green plants use sunlight to synthesize foods with carbon dioxide and water.
  11. 22. Urban planning approach that focuses on sustainable development.
  12. 25. Cultivation of a single crop in a given area.
  13. 27. Community of living organisms interacting with their non-living environment
  14. 29. Process of converting waste into reusable material.
  15. 33. Increase in the concentration of toxins as they move up the food chain.
  16. 35. Lowest region of the atmosphere, where weather occurs.
  17. 40. Meeting needs of the present without compromising future generations.
  18. 41. Natural fuels formed from the remains of living organisms.
  19. 43. Rainfall made acidic by atmospheric pollution.
  20. 44. Process by which a species becomes better suited to its environment.
  21. 45. Depleting the stock of fish in a body of water by too much fishing.
  22. 46. Total mass of organisms in a given area or volume.
  23. 47. Flat area of land next to a river or stream, prone to flooding.
  24. 48. Long-term alteration of temperature and typical weather patterns in a place.
Down
  1. 1. Measure of human demand on Earth's ecosystems.
  2. 2. Global sum of all ecosystems; zone of life on Earth.
  3. 4. Farming of aquatic organisms such as fish, crustaceans, and aquatic plants.
  4. 5. All the waters on Earth's surface, including lakes, seas, and oceans.
  5. 6. Series of processes by which carbon compounds are interconverted in the environment.
  6. 7. Triatomic molecule, O3, found in the Earth's stratosphere.
  7. 9. Variety of life in a particular habitat or ecosystem.
  8. 12. Process by which soil and rock are removed from the Earth's surface by wind or water flow.
  9. 17. Type of energy source that is naturally replenished.
  10. 18. Gases that trap heat in the atmosphere, contributing to global warming.
  11. 20. Clearing of trees, transforming a forest into cleared land.
  12. 21. Concern about and action aimed at protecting the environment.
  13. 23. Capable of being decomposed by bacteria or other living organisms.
  14. 24. Contamination of air, water, or soil by harmful substances.
  15. 26. Total greenhouse gas emissions caused by an individual, event, organization, or product.
  16. 28. Land area that is saturated with water, either permanently or seasonally.
  17. 30. Process of settling or being deposited as sediment.
  18. 31. Non-native species that spread widely and cause harm to the environment.
  19. 32. Accumulation of soluble salts in soil, hindering crop growth.
  20. 34. Type of renewable energy derived from the Earth's internal heat.
  21. 36. Natural home or environment of an animal, plant, or other organism.
  22. 37. Protection and preservation of natural resources.
  23. 38. Able to be maintained at a certain rate or level without depleting resources.
  24. 39. Process by which fertile land becomes desert.
  25. 42. Rigid outer part of the Earth, consisting of the crust and upper mantle.
  26. 44. Proportion of light or radiation that is reflected by a surface.