Pasteurization and greenhouse: what they have in common

1. Step 1. Pasteurization — uses — Heat transfer. The product is heated to 60–70 °C.
2. Step 2. Heat transfer — is used in — Solar water heater. Heating the water.
3. Step 3. Solar water heater — has part — Window glass. The glass on top creates a greenhouse effect.
4. Step 4. Window glass — is part of — Greenhouse. It lets light in and holds heat.

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