coal and petroleum

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