Silicon was a chemical element that was a hard and brittle crystalline solid.
Although carbon was a common element that organic life forms were based on, some life forms, such as the Earthors, Rock Men, Dryads and others were silicon based life forms.
The Water People used silicon for fuel. They attempted to mine it from the oceans of Earth, but it caused ecological disasters, creating red tide.
The Super Friends provided them with all the silicon they needed, without depleting it from the ocean.
- ↑ As seen in the Superfriends season one episode The Watermen (1973).