Assertion: plutonium | /r/HasProperty | man
Facets:
value: by most
type: OTHER
Source sentences:
text: There should be no doubt that plutonium is an man made toxic and radioactive element ;the featured article on plutonium in this worthy encyclopdia gives the impression that Pu is mainly natrually occuring and
text: Nearly all plutonium is man-made.
text: Plutonium and other so-called transuranic elements are considered by most to be man-made elements.
text: Plutonium is considered a man-made element, although scientists have found trace amounts of naturally occurring plutonium produced under highly unusual geologic circumstances.