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A comment on Huge helium discovery 'a life-saving find'. Parent comment

Re:Huge helium discovery 'a life-saving find' by logfromblammo on Tuesday June 28, 2016 @10:33AM (#11994070)
One half-millionth is 2 ppm. Half of one-millionth is 0.5 ppm. Wikipedia says the concentration is 5.2 ppm.
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