Floppy disk and oil well: what they have in common

1. Step 1. Floppy disk — is made of — PET. The disk is Mylar (PET) with a magnetic coating.
2. Step 2. PET — includes — Polyester. Polyester fibre is PET.
3. Step 3. Polyester — evolved from — Nylon. The next synthetic fibre.
4. Step 4. Nylon — is made of — Crude oil. The raw material is petrochemical.
5. Step 5. Crude oil — uses — Oil well. Oil is extracted from wells.

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