Why it is important
Ionising radiation cause damage to DNA and increases cancer risk. The average amount of radiation a person receives each year from natural sources in the United States is about 310 millirem. 10 - 50 rem received in a short period or over a long period usually have no observable health effects. 50 - 100 rem received in a short period will likely cause some observable health effects and received over a long period will increase your chances of getting cancer.
|I am familiar with common sources of radiation.|
|I am familiar with emergency procedures for nuclear accidents.|
|My house does not have excessive Radon gas levels.|
|I do not take X-rays and CT scans more than I really need.|
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