Nuclear energy is a useful source of power but has disadvantages. what is a
disadvantage of nuclear energy?

Nuclear energy:

The energy which is harvested due to the nuclear fusion or fission occurring in a reactor is called nuclear energy. Though this energy has much application it has certain disadvantages.

Disadvantages of nuclear energy:The radioactive waste originating from atomic power plants and the reactors used act an extraordinary danger to Mother Nature and people. Improper disposal of radioactive waste released from the reactors, act as base of many deathly diseases. Another major disadvantage of utilizing nuclear energy is that it needs a ton of venture to set up an atomic power station. Developing an atomic power plant requires enormous capital cost. When the waste of this energy production process is lead to river body it causes eutrophication which causes the death of the aquatic life.

Giga is the second highest prefix on the normal scale, the first is terra.