What do the 3 arrows mean in recycling?

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Tags

1. #symbol
2. #actual
3. #forms
4. #meaning
5. #process
6. #closed
7. #recycling
8. #represents
9. #purchase
10. #products
11. #collection
12. #represent
13. #materials
14. #arrows
15. #first
16. #three
17. #recycled
18. #third