Half life of radioactive oxygen (70 seconds) atom is incredibly short. Tritium (H) half-life is 12.32 years, found naturally in exosphere (highest altitude) by

Half life of radioactive oxygen (70 seconds) atom is incredibly short. Tritium (H) half-life is 12.32 years, found naturally in exosphere (highest altitude) by cosmic rays but is even incredibly rarest to be in contact with even when released by a nuclear bomb. Some antique watches uses tritium for their glowing properties and hence even rarer (banned in 1998). Tritium (H+3) can bond with oxygen to make heavy water and is easily pee'd out ones' bladder. Distillation ensures that only dust-free water molecule rises for collection and rarity of tritium is essentially a non-issue. - https://www.britannica.com/science/oxygen-group-element/Isotopes https://www.britannica.com/science/oxygen-group-element/Isot...