Environment Crossword

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Across
  1. 1. Safe drinking water
  2. 3. Largest source of energy
  3. 6. Planting more trees
  4. 9. Cutting down forests
  5. 10. Third R after Reduce and Reuse
  6. 11. Dirty air caused by smoke and harmful gases
  7. 12. Layer of gases around Earth
Down
  1. 2. Plants and animals living together
  2. 4. Protected area for wild animals
  3. 5. Variety of plants and animals
  4. 7. Things in nature people use
  5. 8. Gas used by plants in photosynthesis