THE 3Rs

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Across
  1. 2. a place where rubbish is buried:
  2. 5. able to be recharged
  3. 7. decaying plant material that is added to soil to improve its quality
Down
  1. 1. a device for burning things that are no longer wanted
  2. 3. damage caused to water, air, etc. by harmful substances or waste
  3. 4. unwanted matter or material of any type, especially what is left after useful substances or parts have been removed
  4. 5. to put a material that has been used through another industrial process to change it so that it can be used again
  5. 6. to collect and treat rubbish in order to produce useful materials that can be used again