Across
- 6. Capable of being maintained long-term without depleting resources.
- 7. River: The largest river by discharge volume in the world, located in South America.
- 9. The period of the day between afternoon and night.
- 10. A wide view of an area of nature, often with mountains or fields.
- 12. Layer of gases surrounding the Earth.
- 13. Contamination of air, water, or soil.
- 14. Study of interactions between organisms and their environment.
- 15. A nation with its own borders and government.
Down
- 1. To join or take part in an activity.
- 2. Water sport that involves riding waves on a board.
- 3. Offering your time and skills without expecting payment.
- 4. water: Important action to conserve a vital resource.
- 5. teeth: Daily activity to maintain dental hygiene.
- 8. do it!: Motivational phrase to start a task together.
- 11. Places where solid waste is deposited.