Across
- 3. Wetland, swamp, or bog
- 5. energy Radiant energy emitted by the sun
- 9. The clearing of trees
- 10. warming Increase in the average temperature of the earth's surface
- 11. energy Energy resources such as wind power or solar energy that can keep producing indefinitely without ever running out
- 13. Substances that cause cancer, such as tar
- 15. Waste material that is able to be broken down and absorbed into the ecosystem
- 18. energy Turbines convert the kinetic energy of wind into mechanical or electrical energy
- 19. rain The precipitation of dilute solutions of strong mineral acids
- 20. Toxic or radioactive gases or particular matter introduced into the atmosphere; very bad for the environment
Down
- 1. System of collecting, sorting, and reprocessing old material into usable raw materials
- 2. species Species in danger of extinction
- 4. Electricity produced by water power
- 6. energy Atomic energy; the energy released by a nuclear reaction
- 7. Environmental Protection Agency
- 8. dioxide A naturally occurring greenhouse gas in the atmosphere; what you exhale
- 12. Fog or haze intensified by smoke or other atmospheric pollutants
- 14. energy Energy that does not pollute the atmosphere when used
- 16. Petroleum fueled; used to power cars, trucks, lawnmowers, etc
- 17. The 500 km thick layer of air surrounding the earth