Robert Llewellyn learns about the large rock-filled dam at El Cajon dam in western Mexico, where almost five billion cubic metres of water is used to generate electricity. He also investigates the process of fitting tiny transistors onto microchips, discovering that an ultra-clean facility is necessary to minimise dust in the air.
| Name | Type | Role | |
|---|---|---|---|
| Susan Monaco | Director | ||
| Peter Chinn | Director |