Across
- 2. – A gas produced by burning fossil fuels; major greenhouse gas. (Better answer: CarbonDioxide)
- 4. – A substance that contaminates the environment.
- 6. – A species no longer in existence
- 10. – Energy from the sun.
- 11. – The process of clearing forests for agriculture or development.
- 13. – Movement of water through the environment in a continuous cycle.
- 15. – Chemicals used to kill insects and protect crops.
Down
- 1. – The ability to meet present needs without compromising future generations.
- 3. – Underground layers that hold groundwater.
- 5. – The layer of gases surrounding Earth.
- 7. – Warming of ocean waters causing coral to expel algae and turn white.
- 8. – The gradual increase in the Earth’s temperature caused by gases trapping heat. (Better answer: Globalwarming)
- 9. – The variety of living things in an ecosystem.
- 12. – The wearing away of land by wind, water, or other natural forces.
- 14. – Rain, snow, or fog that has a low pH due to pollutants.