Cardboard box and smart meter: what they have in common

1. Step 1. Cardboard box — is made of — Wood pulp. Corrugated board.
2. Step 2. Wood pulp — is made of — Cellulose. Wood cellulose.
3. Step 3. Cellulose — is material for — Celluloid. Nitrocellulose.
4. Step 4. Celluloid — is material for — Polarizing filter. Land’s Polaroid is aligned crystals in a film.
5. Step 5. Polarizing filter — is part of — Liquid-crystal display. Polarizers.
6. Step 6. Liquid-crystal display — is part of — Smart meter. A display.

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