Fuel Efficient Cars & Synthetic and Natural Resources

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Across
  1. 6. that break down over time.
  2. 7. that come from the Earth.
  3. 8. much of our trash ends up.
  4. 9. that are man made.
  5. 10. operating vehicles need to be.
Down
  1. 1. fuel how can car run.
  2. 2. recycled tire may become.
  3. 3. of fuels.
  4. 4. cars may one day.
  5. 5. cars run.