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  1. Recycle Symbol Meanings: How to Read Plastic Recycling Codes

  2. Your Guide to Plastic Recycling Symbols - Acme Plastics

  3. Recycling symbol - Wikipedia

  4. Complete Guide to Reading Recycling Symbols | RTS

  5. Recycling Symbols, Decoded - Real Simple

  6. Recycling Symbols and What They Mean - GraingerKnowHow

  7. A Look at the History of the Universal Recycling Symbol