Transatlantic cable and greenhouse: what they have in common

1. Step 1. Transatlantic cable — has part — Copper wire. A copper core.
2. Step 2. Copper wire — is part of — Printed circuit board. Copper traces.
3. Step 3. Printed circuit board — is part of — Remote control. Inside a remote is a circuit board with buttons and an infrared LED.
4. Step 4. Remote control — uses — Infrared radiation. An infrared signal.
5. Step 5. Infrared radiation — is used in — Greenhouse effect. Infrared radiation is trapped.
6. Step 6. Greenhouse effect — is used in — Greenhouse. Glass lets light in and holds heat.

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