Satellite television and greenhouse: what they have in common

1. Step 1. Satellite television — uses — Communications satellite. Relaying.
2. Step 2. Communications satellite — has part — Solar panel. Power comes from solar panels.
3. Step 3. Solar panel — has part — Window glass. Tempered cover glass.
4. Step 4. Window glass — is part of — Greenhouse. It lets light in and holds heat.

Open Evothings