Combustion and Flame

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Across
  1. 1. petroleum gas better domestic fuel then wood
  2. 3. value the energy content per unit mass of the fuel
  3. 5. per kg value of fuel expressed in a unit
  4. 7. a substance where combustion doesn't take place
  5. 8. increase of carbon dioxide
  6. 10. cutting of trees
Down
  1. 2. combustion results in release of carbon monoxide
  2. 4. substance having very low ignition temperature
  3. 6. Fuel fuel which full fills all the requirements
  4. 9. Rain oxides of sulphur and nitrogen dissolve in rain