Across
- 1. What we create when we throw things away
- 5. A nonrenewable resource formed from ancient plant matter
- 6. A renewable energy source that uses moving air
- 8. A renewable energy source that comes from the sun
- 10. Resources that will be gone once used up
- 11. The surrounding natural world
- 14. Areas of land that are wet year-round and support unique ecosystems
- 15. The study of living things and their environment
- 18. Professionals who work to protect natural resources
- 19. The process of cutting down forests
Down
- 2. The type of resources that can be replenished over time
- 3. A renewable energy source from the Earth's heat
- 4. What happens to land when soil washes away
- 7. Harmful substances that can enter air or water
- 9. All living things need this to survive
- 12. Power generated from moving water
- 13. Type of development that focuses on long-term resource use
- 16. A nonrenewable energy source made from ancient organisms
- 17. The science of managing forests