| http://www.w3.org/ns/prov#value | - Carbon-14 (14C) is a naturally occurring radioisotope which occurs in trace amounts on Earth of up to 1 part per trillion (0.0000000001%), mostly confined to the atmosphere and superficial deposits, particularly of peat and other organic materials.[37] This isotope decays by 0.158 MeV ??- emission.
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