Across
- 4. Manufactured fuel such as oil made from coal
- 5. Power plant used only when demand spikes
- 7. Fossil fuel formed from ancient plant matter
- 8. Early-stage coal precursor with low energy content
- 10. Using less energy to perform the same task
- 11. Power from moving water
- 14. Fuel used in nuclear power plants
- 17. Small modular nuclear reactor design
- 18. Ratio of actual energy produced to maximum possible output
- 19. Opposition to energy projects near residential areas
- 22. Electrical power unit
- 23. Liquid fossil fuel used for transportation
- 24. Energy from the sun
- 25. Network delivering electricity to users
- 26. Energy sources that replenish naturally
- 28. Cleanest-burning fossil fuel
- 29. Surface layer removed during strip mining
- 33. Power generated by moving air
- 34. Device spun by water, wind, or steam to generate power
- 35. Ground sinking caused by underground mining
- 36. Energy from burning organic material
- 37. Energy remaining after subtracting energy inputs
- 38. Reducing energy use
Down
- 1. Powerful greenhouse gas released during fossil fuel extraction
- 2. Cloudiness of water often increased by mining runoff
- 3. Method of extracting natural gas using high-pressure fluids
- 6. Biofuel made from fermented plant sugars
- 7. Using waste heat to produce additional electricity
- 8. Solar panels that convert sunlight into electricity
- 9. Thick tar-like petroleum found in oil sands
- 12. Hardest and cleanest-burning form of coal
- 13. Electricity network using digital communication to improve efficiency
- 15. Ratio of energy returned to energy invested
- 16. Device that stores electrical energy temporarily
- 20. Unit measuring heat energy
- 21. Energy sources that cannot be replaced quickly
- 27. Heat energy from inside Earth
- 30. Pollutants released into the air
- 31. Machine that converts mechanical energy into electricity
- 32. Splitting atoms to release nuclear energy