Natural Resources

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Across
  1. 2. a colorless volatile flammable liquid which is produced by the natural fermentation of sugars
  2. 4. a biofuel intended as a substitute for diesel
  3. 6. produced by the fermentation of organic matter
  4. 7. power obtained by harnessing the energy of the wind
  5. 8. a living organism that feeds on organic matter
Down
  1. 1. a living organism of the kind exemplified by trees
  2. 3. hydroelectric power
  3. 5. used for fuel or timber
  4. 6. the total mass of organisms in a given area or volume