Across
- 2. collecting, handling, and disposing of waste properly
- 5. limits that depend on population size (disease, competition)
- 9. the condition of the environment around us
- 10. agreement to protect the ozone layer by reducing harmful chemicals
- 11. limits unrelated to population size (hurricanes, droughts)
- 13. to reduce the severity of something
- 14. using up a resource
- 16. harmful substances in the environment
- 19. U.S. law that protects water quality
- 21. harmful substances entering the environment
- 22. methods that protect resources for the future
- 24. turning used materials into new products
- 25. regularly checking conditions or changes
- 26. accidental release of oil into water or land
- 30. pollution from one specific source
- 31. amount of greenhouse gases caused by a person or activity
- 33. number of individuals living in a certain area
- 35. resources that can naturally be replaced over time
- 37. using resources faster than they can be replaced
- 40. pollution from many scattered sources
- 42. moving out of a population
- 43. using living organisms or cells to make products or solve problems
- 44. laws made by the government
- 45. things that control population size
- 48. materials from nature people use
- 49. protecting land and natural habitats
- 50. careful use and protection of water resources
- 51. dangerous waste harmful to people or the environment
- 52. disease-causing organisms like bacteria or viruses
- 53. resources that cannot be replaced quickly
- 54. inherited traits that affect health
- 55. damage or loss of natural habitats
Down
- 1. cutting down large areas of forests
- 3. international agreement to reduce greenhouse gas emissions
- 4. damage to the environment
- 6. the number of humans living in an area
- 7. water that carries pollutants over land into waterways
- 8. having enough safe food available for everyone
- 12. places where trash is buried
- 15. protecting the health of communities and populations
- 17. thinning of the ozone layer in Earth’s atmosphere
- 18. changing an organism’s DNA to give it new traits
- 20. movement of nitrogen through living things, soil, water, and air
- 23. a group of individuals living in the same area
- 27. outside conditions that affect health
- 28. breaking down organic waste into nutrient-rich soil
- 29. able to break down naturally in the environment
- 32. total number of individuals in a population
- 34. the largest population an environment can support
- 36. rapid population growth with few limits
- 38. moving into a population
- 39. energy sources formed from ancient organisms (coal, oil, natural gas)
- 41. population growth that slows as resources become limited
- 46. how humans consume natural resources
- 47. U.S. law that regulates air pollution