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Across
  1. 4. landfills?
  2. 5. earth's protective layer?
  3. 6. energy sources from the sun?
  4. 9. reforestation activities?
  5. 10. animals losing their homes?
  6. 11. harmaful gases from vehicles?
  7. 12. saving natural resources?
Down
  1. 1. illegal logging?
  2. 2. wastewater from waste?
  3. 3. disasters caused by excessive waste?
  4. 5. biodegradanle waste?
  5. 7. what is polluted air called
  6. 8. what is habitat for living things?
  7. 13. water falling from?