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Which radioactive pollutant has recently drawn the attention
of the public, due to its occurrence in the building material?
1 Radium
2 Radon
3 Thorium
4 Plutonium
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Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material? 1 Radium 2 Radon 3 Thorium 4 Plutonium
Biological Sciences 
