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Sentences with phrase «radioactive substances naturally»
Among the dozens of
radioactive substances naturally
present in seawater (of which cesium - 137 is one), uranium - 238 and potassium - 40 are the ones present in the greatest abundance.
http://www.whoi.edu/
Not exact matches
Many of the
radioactive
substances
do not occur
naturally
.
http://www.realclimate.org/
Many of the
radioactive
substances
do not occur
naturally
.
http://www.realclimate.org/
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