7.14 describe the dangers of ionising radiations, including

Radiation can cause mutations in living organisms
Radiation can damage cells and tissue
The problems arising in the disposal of radioactive waste

and describe how the associated risks can be reduced.

Ionising radiation can damage the molecules that make up the cells of living organism and damages cell and tissues. Eventually, later cell might behave in an unexpected way called mutation. Once mutation occurs, it transfers from parent to children and so on for hundreds of generation.

Radioactive waste might damage environment. So they are stored in sealed thick containers that is capable of containing the radioactivity for a long period of time.