Across
- 5. burning
- 7. a type of alcohol fuel made by plants
- 10. heating biomass in the absense of oxygen
- 11. electricity generated from biomass
- 13. can use it more than once
- 14. things from the environment used for fuel
- 15. plants grown especially for their fuel
Down
- 1. things from the earth
- 2. a thermalochemical process the converts biomass into a gas
- 3. a mixture of hydrogen and carbon
- 4. the raw material used in a conversion process
- 6. any organic matter
- 8. where the plants are grown
- 9. a chemical reaction involving water
- 12. where plants are broken down into chemicals