Across
- 3. The act of sending gas, heat, light, etc. into the air.
- 8. The work of building something, especially large structures.
- 10. The ability to be happy or successful again after difficulty; the ability to resist damage.
- 13. The strong effect something has on a person, situation, or environment.
- 14. The air, water, and land in or on which people, animals, and plants live.
- 15. The ability to change or be changed to fit new conditions.
- 17. A hard, strong building material made by mixing cement with sand, gravel, and water.
- 18. Useful or valuable materials that can be used to support activities such as production.
Down
- 1. Materials made from two or more different substances that, when combined, are stronger.
- 2. The act of judging or deciding the amount, value, or importance of something.
- 4. A new idea or method, or the use of such ideas to improve something.
- 5. The process by which towns and cities grow as more people live and work there.
- 6. The quality of causing little or no damage to the environment and continuing for a long time.
- 7. A measurement of the effect that a person or activity has on the environment.
- 9. Material used to stop heat, sound, or electricity from escaping or entering.
- 11. The relationship between living things and the environment.
- 12. The good use of time and energy in a way that avoids wasting resources.
- 16. The state of being whole, strong, and not damaged.