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A geology professor at Case Western Reserve University said trace amounts of radiation from Japan were found in rainwater collected on a campus building.

According to a news release from CWRU, Professor Gerald Matisoff detected tiny amounts of Iodine 131 on the top of the A.W. Smith Building, but said the presence of it is not dangerous to humans.

Matisoff estimated the level of radiation from this sample at one-tenth of natural background radiation.

“In theory, the Iodine 131 could have come from any radioactive waste processing facility,” Matisoff said. “But, we know it’s from Japan. The isotope is being seen worldwide.”

Masisoff collects water to monitor the particulates being carried into rain into Lake Erie.

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