system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] what are the primary sources of energy for the Federarion?
gpt
Mostly fusion for planetary and station needs.  Starships have a combination of fusion reactors and m/am reactors.  

Starships need massive power output to travel at warp and one way to do that is a matter/antimatter reaction.  However, to get antimatter you need to make it.  The TNG:TM has this to say on antimatter generation:

>As used aboard the USS Enterprise, antimatter is first generated at major Starfleet fueling facilities by combined solar-fusion charge reversal devices, which process proton and neutron beams into antideuterons, and are joined by a positron beam accelerator to produce antihydrogen (specifically antideuterium). Even with the added solar dynamo input, there is a net energy loss of 24% using this process, but this loss is deemed acceptable by Starfleet to conduct distant interstellar operations.

As is stated above the creation of antimatter an energy loss.  Antimatter is also extreamly dangerous.  An antimatter containment failure on a planet of even a few kg would be devastating.  Where fusion is much safer.  Coupled with abundant space to build power plants and easy/cheap fuel sources, there is no need for m/am reactors on planets.