Across
- 2. - The process by which soil and rock are removed by natural forces.
- 4. - Gases released into the atmosphere, often from vehicles or factories.
- 6. - Energy that is collected from resources that naturally replenish.
- 7. - Able to be maintained without depleting resources.
- 9. - Contamination of the natural environment.
- 10. - Capable of being broken down by natural processes.
Down
- 1. - To use resources sparingly to protect them for future use.
- 3. - Process of replanting trees to restore a forest.
- 5. - Natural home of a plant or animal.
- 8. - The power to do work, often used in discussions about renewable sources.