Using a nuclear fission reaction and uranium as fuel, nuclear power plants generate high amount of electricity. As nuclear power plants emit low greenhouse gas emissions, the energy is considered environmentally friendly. When compared to renewable sources of energy such as solar and wind, the power generation from nuclear power plants is also considered more reliable.Though the investments required to set up nuclear power plants are huge, the costs involved in operating them are low. Nuclear energy sources also have higher density than fossil fuels and release massive amounts of energy. Due to this, nuclear power plants require low quantities of fuel but produce enormous amounts of power, making them particularly efficient once up and running.