Across
- 3. Organic matter rotting or decomposing
- 4. Powdery Particles of wood
- 6. Energy that will not run out
- 7. A substance that pollutes
- 8. Able to continue for a long time
- 10. What is left after the main part is gone
- 11. Created from living matter
- 13. Organic matter used as fuel
Down
- 1. A device used to heat things to high temperatures
- 2. An engine that converts mechanical energy into electrical energy
- 5. Not releasing carbon dioxide into the atmosphere
- 9. Making effective use of money
- 12. Plants grown on a large scale for commercial use