| 1. | Most rocks, due to their components, have a low level of radioactivity.
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| 2. | A search of his apartment also turned up high levels of radioactivity.
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| 3. | These levels of radioactivity pose little danger but can confuse measurement.
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| 4. | The level of radioactivity is being constantly monitored and remains normal.
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| 5. | Greenpeace claimed their levels of radioactivity were " sufficiently high ."
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| 6. | A lab spokesman said air monitoring has detected no elevated levels of radioactivity.
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| 7. | "The level of radioactivity was so low that it couldn't cause any harm.
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| 8. | The council said the levels of radioactivity were too low to cause concern.
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| 9. | "It's not that the level of radioactivity is the problem,"
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| 10. | Also, vacationers at summer cabins are subjected to dangerous levels of radioactivity from well water.
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