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