environment

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Across
  1. 2. the activity of treating materials or products using a special industrial process so that they can be used again
  2. 3. waste material or things that are no longer wanted or needed
  3. 5. a thick, liquid substance that burns and is used as fuel or as a lubricant
Down
  1. 1. damage caused to water, air, etc. by harmful substances or waste
  2. 4. air pollution caused by smoke or chemicals mixing with fog