Nuclear power is classed as a low-carbon source of energy as it has very little impact on climate change by generating fewer emissions than fossil fuels.
However, nuclear power isn’t considered to be renewable or green. This is because it uses uranium or plutonium as fuel which isn’t renewable as it exists in tiny amounts on Earth. Nuclear waste is also extremely dangerous and expensive to dispose of.
That being said, nuclear power is still much less harmful to the planet than fossil fuels.