Across
- 2. Diesel substitute produced by extracting and chemically altering oil from plants
- 6. Energy generated from the kinetic energy of moving air
- 8. Property of a building material that allows it to maintain heat or cold
- 9. Billing system used by electric companies, customers pay higher rates as their use goes up
- 12. Finding and implementing ways to use less energy
- 14. Activity that does not change atmospheric CO2 concentrations
- 15. Electricity generated by the kinetic energy of moving water
- 16. Electrical-chemical device that converts fuel into an electrical current
- 17. Vehicle that runs on either gasoline or a gasoline/ethanol mixture
- 19. Alcohol made by converting starches and sugars from plant material into alcohol and CO2
- 21. Accumulation of sediments, primarily silt, on the bottom of a reservoir
- 25. Application of an electric current to water molecules to split them into hydrogen and oxygen
Down
- 1. Energy that comes from the movement of water driven by the gravitational pull of the Moon
- 3. System of capturing energy from sunlight and converting it directly into electricity
- 4. Heat energy that comes from the natural radioactive decay of elements deep within Earth
- 5. Greatest quantity of energy used at any one time
- 7. The storage of water in a reservoir behind a dam
- 10. Energy source that can be renewed in a human generation
- 11. Energy source that can be regenerated indefinitely as long as it is not overharvested
- 13. Energy source that cannot be used up
- 18. Construction designed to take advantage of solar radiation without active technology
- 20. Carbon in fossil fuels
- 22. Energy captured from sunlight with advanced technologies
- 23. Liquid fuel created from processed or refined biomass
- 24. Process of removing more than is replaced by growth