system
Given the following post, respond as if you're commenting on Reddit:
human
Are there any fusion reactions using plain hydrogen?

I've looked around and found ones using the isotopes deuterium and tritium and even a helium isotope  helium 3.  However all of those would require a refining process to isolate those isotopes from the much more abundant regular versions of those elements.  

Is there a fusion reaction that uses just plain hydrogen?
gpt
Sure, you can fuse anything with anything. Although only certain fusion reactions are exothermic, and only certain exothermic fusion reactions actually release a decent amount of energy. DD and DT are ideal for power generation.