Using the ocean to run a heat engine
In 1976, science fiction writer Jerry Pournelle published a Galaxy magazine article titled How Long until Doomsday? It was written partly in response to The Club of Rome’s downer of a book called The Limits to Growth, which saw economies going forward as severely resource-limited. One way out of our energy dilemma, according to Pournelle, was to harness the heat being harvested by the ocean. The Gulf Stream, he pointed out, had 75 times the energy being used at the time in the United States.