Across
- 2. The ability to do work
- 5. mining/ minimal effects on the surface, road building, soil degradation
- 7. strip mine/ type of coal mine
- 9. drainage/ oxygen, water, and pyrite react and form sulfuric acid
- 11. energy/ An energy source that can be easily replenished
- 12. removal/ type of coal mine
- 13. a solid, combustible mineral made of carbon, formed from organic matter often million of years of comparison.
- 14. energy source/ Energ forms that can be used directly as they appear in nature
Down
- 1. energy/ derived from sources that will run out or will not be replenished in our lifetimes.
- 3. mining/ mountaintop removal, strip mining
- 4. cons/ highly polluting, damages environment, emits Co2, global warming.
- 6. energy source/ electricity, coal, alcohol fuels
- 8. and water pollution/ change in Co2 composition
- 10. fuels- remains of ancient organisms that with time and pressure converted into coal, oil, or natural gas
- 13. pros/ inexpensive, easy to transport easy to use as a fuel source