Cold chain and electrical grid: what they have in common

1. Step 1. Cold chain — uses — Refrigerator. Refrigerators.
2. Step 2. Refrigerator — works like — Heat pump. A heat pump is a refrigerator that heats the house.
3. Step 3. Heat pump — is used in — Air conditioner. An air conditioner is a heat pump that carries heat out of the room.
4. Step 4. Air conditioner — is part of — Data centre. Cooling.
5. Step 5. Data centre — uses — Electrical grid. Power.

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