Across
- 4. resource that will never run out
- 5. conversion wood into coal
- 6. has 96 carbon content
- 7. used to produce heat
- 9. components of different boiling
- 10. 65 percent of carbon
Down
- 1. used by plant to make food
- 2. gas passing red hot coke
- 3. gas passing steam over white coke
- 5. wise use of resources
- 8. oil boiling point 250-350 C