Answer the following question given this paragraph: 

Nuclear power is a controversial subject in California and most other places. Nuclear power has no pollutants including no carbon emissions. However, power plants are not always safe. The long-term disposal of wastes is a problem that has not yet been solved. The future of nuclear power is murky. Find out more at: http://science. kqed. org/quest/audio/new-nuclear/.


Q: What kind of power does not produce any pollutants, but produces waste that can be difficult to dispose of?

 Choices:

- electrical

- biofuel

- solar

- nuclear

A:
nuclear
