health, for example the respiratory system. The fluorine content is
approximately 850 mg/kg
according to
chemical analysis carried out by the Institute of Earth Sciences, University of Iceland, on a sample taken 19
April. An earlier sample since 14
April only measured 25-35 mg/kg of fluorine
because the water vapour from melting ice rinsed the
ash. When the eruption progressed, water
became less
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