That link says Nader said "Any use of plutonium, a tiny 0.2 micrograms of which has given lung can­cer to animals, must be viewed with utmost caution". That's

That link says Nader said "Any use of plutonium, a tiny 0.2 micrograms of which has given lung can­cer to animals, must be viewed with utmost caution". That's pretty close. With a bit of Google Scholar search I found David Krieger's 1975 article "Terrorists and nuclear technology" in the Bulletin of the Atomic Scientists, at https://www.tandfonline.com/doi/abs/10.1080/00963402.1975.11458253 https://www.tandfonline.com/doi/abs/10.1080/00963402.1975.11... which says: > Plutonium-239, the product of the nuclear fuel cycle used for the construction of nuclear weapons, is one of the most toxic substances known to man. It is also a substance which occurs rarely in nature and is almost entirely man-made in the nuclear fuel cycle. One microgram of plutonium-239 ingested into the lungs is capable of causing lung cancer. Approximately, one 8,000,000th of a pound of inhaled plutonium has caused lung cancer in animals. Thus, when effectively dispersed, a much smaller quantity of plutonium than would be needed for a nuclear bomb could necessitate the evacuation of dense urban areas. There's the 8 billion. We know that quotes get mis-attributed to more famous people. My guess is that Krieger's comment got rephrased and mis-attributed to Nader, who was, after all, talking about the same topic.