Or the moon, or Uranus
Most of the helium on the Earth is from radioactive decay.
The helium on the moon, however, is from capture from solar wind... and has a higher concentration of helium 3. https://www.esa.int/Enabling_Support/Preparing_for_the_Futur...
What happened here? Does the European Space Agency not have anyone who can proofread an English document? Why are they publishing in English?