Across
- 3. destruction of soil that makes it hard to grow plants
- 7. things we need to make stuff
- 8. a natural system of plants, animals, and weather that enables life
- 9. garbage and chemicals in the environment
- 10. the warming of the planet through human activity
- 12. a place where plants or animals live
- 14. digging metals out of the ground
Down
- 1. removing forests
- 2. a chemical that keeps the planet warm
- 4. a sign of a healthy ecosystem with many plants and animals
- 5. another name for farming
- 6. efforts to protect plants and animals
- 11. plants or animals that move to new ecosystems and take over, usually with human help
- 13. when too much fishing destroys fish populations