Oil cracking and smart meter: what they have in common

1. Step 1. Oil cracking — uses — Catalysis. Catalytic cracking.
2. Step 2. Catalysis — is used in — Fuel cell. A platinum catalyst.
3. Step 3. Fuel cell — uses — Electrochemical reaction. The reaction runs electrochemically, without combustion.
4. Step 4. Electrochemical reaction — is used in — Glucose meter. An electrochemical sensor.
5. Step 5. Glucose meter — has part — Liquid-crystal display. A screen.
6. Step 6. Liquid-crystal display — is part of — Smart meter. A display.

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