people and the planet

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Across
  1. 4. axis windmill was later developed in Europe
  2. 5. were invented between 1500 and 1100years ago in persia, in the land that is now iran
  3. 6. some power stations use_________ resources of
  4. 9. are chemicals and can be harmfull to animals
  5. 10. invented a machine that used the poweroof running water to grind flour this machine was a water mill
Down
  1. 1. were made in the 1920s for the fist time
  2. 2. ago human species first developed in East Africa
  3. 3. invented the steam engines
  4. 7. were developedin the middle of 20th century.
  5. 8. came after steam engines