Firebox and solar panel: what they have in common

1. Step 1. Firebox — is part of — Hypocaust. A furnace outside the building.
2. Step 2. Hypocaust — is made of — Brick. The pillars of a hypocaust are brick.
3. Step 3. Brick — is material for — Power station. The buildings of the first power stations were brick.
4. Step 4. Power station — includes — Solar power station. A power station.
5. Step 5. Solar power station — has part — Solar panel. A field of panels.

Open Evothings