International Earth Day 8

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Across
  1. 3. The smallest planet in our solar system (4)
  2. 5. The action of cleaning up trash from the environment (7)
  3. 6. A natural source of light in the sky (3)
  4. 7. A gentle, slow-moving mammal (5)
  5. 9. A fragrant flower often associated with love (4)
Down
  1. 1. The action of saving energy (6)
  2. 2. A man-made container for waste disposal (3)
  3. 4. Animals with scales (6)
  4. 5. The Earth's outer layer (5)
  5. 8. The liquid inside a lake (4)