system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why aren't we taking advantage of the Earth's magnetic field to generate electricity?

Assume that I have exactly enough information to get terminology, and not much else.
gpt
Because you can't get energy from a static magnetic field.  Either you have to move wires through a magnetic field, or you have to move a magnetic field past stationary wires.

And since we have to have motion, and since the Earth's magnetic field is so weak (compared to the magnets used in generators), we get better results simply using electric generators.