Hot water storage tank e shaduf: o que têm em comum

1. Passo 1. Hot water storage tank — faz parte de — Solar water heater. A store of hot water.
2. Passo 2. Solar water heater — tem como parte — Window glass. The glass on top creates a greenhouse effect.
3. Passo 3. Window glass — faz parte de — Greenhouse. It lets light in and holds heat.
4. Passo 4. Greenhouse — utiliza — Irrigation. Watering plants.
5. Passo 5. Irrigation — utiliza — Shaduf. The shaduf fed water into the canals.

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