Environment

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Across
  1. 3. an example for renewable energy sources
  2. 4. it is a greenhouse gas
  3. 6. synonym for household rubbish
  4. 7. sth. that you can use more than once
Down
  1. 1. a cause of global warming
  2. 2. another word for to burn sth.
  3. 5. represent 80% of the world's energy consumption
  4. 7. they are rising because of global warming
  5. 8. they are melting