Across
- 4. – Cultivation of a single crop over a large area.
- 5. – Leaving one's country to live elsewhere.
- 7. – Standard of health, comfort, and happiness.
- 8. – Air pollution from smoke and fog.
- 10. – Oxygen molecule protecting Earth from UV radiation.
- 11. – Economic factors influencing supply and demand.
- 14. – Average number of children born per woman.
- 15. – Transformation of fertile land into desert.
- 17. – Variety of living species in an area.
- 19. – Extraction of minerals and resources from the earth.
- 23. – Spread of urban development into rural areas.
- 26. – Relationship between product availability and consumer desire.
- 27. – Removal of salt from seawater for drinking or irrigation.
- 30. – Number of deaths per 1,000 people annually.
- 31. – Organisms genetically engineered for specific traits.
- 33. – Ability to reproduce; number of offspring produced.
- 34. – Per person; average per individual.
- 36. – Study of resource allocation, production, and consumption.
- 39. – Cleaning used water before releasing or reusing it.
- 41. – Excessive nutrients in water, causing plant growth and oxygen depletion.
- 43. – Number of births per 1,000 people annually.
- 44. – Substance that contaminates air, water, or soil.
- 46. – Diseases spread through the air.
- 47. – Using resources so they remain available for the future.
- 48. – Build-up of toxins in organisms higher up the food chain.
Down
- 1. – Measure of human demand on natural resources.
- 2. – Diseases spread through contaminated water.
- 3. – Management and care of forests.
- 6. – Materials or assets used to meet needs.
- 8. – A group of people sharing culture and institutions.
- 9. – Increased agricultural output due to new technologies.
- 12. – Warming caused by gases trapping heat in the atmosphere.
- 13. – Methods for manipulating genetic material.
- 16. – Catching fish for food or recreation.
- 18. – Total value of a country’s goods and services, including overseas earnings.
- 20. – Introduction of harmful substances into the environment.
- 21. – Growth of cities as people move from rural areas.
- 22. – Raising livestock, such as cattle or sheep.
- 24. – Increase in number of people in a population.
- 25. – Illnesses caused by fungi.
- 28. – Reduction of ozone in the atmosphere, increasing UV exposure.
- 29. – Processes to make water safe for consumption.
- 32. – Tools and methods used in healthcare.
- 33. – Sudden, large deaths of fish in a water body.
- 35. – Growing crops and raising animals for food and resources.
- 36. – Principles of right and wrong behavior.
- 37. – Changes in population birth and death rates as a society develops.
- 38. – To make steady or prevent sudden changes.
- 40. – Moving into a country to live there permanently.
- 42. – Long-term shifts in Earth’s climate patterns.
- 45. – Related to education or scholarly activities.
- 46. – Rain made acidic by pollutants, harming environments.