The environment

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Across
  1. 4. a weather with strong winds, rain, thunder and lightning
  2. 6. synonymous with heating
  3. 8. a energy source for engines or reactors
  4. 9. a period of abnormally hot weather
  5. 10. to treat something so as to make it suitable for reuse
Down
  1. 1. a mixture of decaying/rotting plants used for fertilizing soil
  2. 2. a great flowing of water causing a disaster
  3. 3. the air surrounding the earth
  4. 5. a long period of dry weather, a shortage of water
  5. 7. an energy that comes from a natural source that will not run out