Glove cuff and fuel cell: what they have in common

1. Step 1. Glove cuff — is part of — Surgical gloves. A rolled edge.
2. Step 2. Surgical gloves — is made of — Natural rubber. Latex.
3. Step 3. Natural rubber — is material for — Vulcanized rubber. Rubber vulcanized with sulfur.
4. Step 4. Vulcanized rubber — is material for — Weather balloon. The envelope is rubber or latex.
5. Step 5. Weather balloon — is made of — Hydrogen. Filled with hydrogen or helium.
6. Step 6. Hydrogen — is used in — Fuel cell. The fuel is hydrogen.

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