Across
- 3. Acidic water flowing from abandoned mines (2 words)
- 4. Fuel source that cannot be replaced
- 6. Increase in Earth’s average temperature (2 words)
- 10. Resources that will eventually run out (2 words)
- 12. Gas that contributes to global warming (2 words)
- 15. A natural resource that can be replaced by nature
Down
- 1. Harmful substance in the air
- 2. Gas released from vehicles due to incomplete combustion (2 words)
- 5. Engineers who protect and restore the environment (2 words)
- 7. Destruction of Earth’s surface by human activity (2 words)
- 8. Materials that exist naturally in the environment (2 words)
- 9. monoxide Poisonous gas that can build up in homes (2 words)
- 11. Trapped heat in Earth’s atmosphere that warms the planet (2 words)
- 13. Trash disposal areas that produce methane
- 14. Chemicals used to kill insects