Upcycling!

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Across
  1. 3. To keep safe.
  2. 4. Turning old things into something new and better.
  3. 6. Not dirty.
  4. 7. Very clever or good at thinking.
  5. 8. What we need to move, run, and play!
  6. 9. The Earth is one!
Down
  1. 1. Stuff we use to make things.
  2. 2. Something that helps or does a job.
  3. 5. Trash or things we throw away.
  4. 6. Full of fun and new ideas.