Why is radioactivity dangerous?

Radioactivity is dangerous because people can be exposed to a harmful amount without realizing it. Also, continuous exposure to small amount over a long time can lead to some forms of cancer later in life.

Radiation can lead to harmful amount of radium to be stored in one’s bones. Radioactivity from nuclear explosions can cause ingenuous quantities of radiostrontium and radiocaesium to get into food.

Radioactivity and radiation can ionize molecules in human and animal DNA changing it can causing cancer

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