Nonrenewable Vocabulary Crossword Puzzle

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Across
  1. 2. flammable gas
  2. 3. working without direct control
  3. 4. often listed as one of the most (if not the most) dangerous jobs (especially coal mining) each year in various dangerous jobs.
  4. 6. have not been properly secured,the result can be a cave-in causing a mine shaft to close.
  5. 9. denoting, possessing, or involving weapons using nuclear energy.
  6. 10. found mainly in underground deposits and widely used as fuel.
Down
  1. 1. would be done manually in dark technology has improved, we've developed tools and machines to improve the job
  2. 5. existing in finite quantity; not capable of being replenished.
  3. 7. a viscous liquid derived from petroleum
  4. 8. chemicals are frequently used to transform