JumpCrisscrossHelium Is Hard to Replace
https://www.construction-physics.com/p/helium-is-hard-to-replace
Is there any way to actually produce helium other than nuclear fusion? I would assume not, but I'm not an expert in this field.
It's also formed similarly to oil over millions of years underground if I understand correctly so can be a byproduct of natural gas mining.
Which is exactly 100% of Earth's helium. Every single helium atom we use is a result of alpha decay, as a very good approximation there isn't any primordial or stellar helium on or in Earth.