Research Prostpectus

I have two ideas in mind and I am struggling to decide between them. I was originally thinking about nuclear power as an alternative energy source because we talked very briefly on how it works in my physics class. I was also thinking about focusing my research on hybrid cars.

Nuclear power interested me because it seems as though we would have to rely heavily on other nations, such as Australia, for sources of the Uranium-235 isotope. Producing this isotope in the lab is possible, but not in the mass quantities we would need it for if we decided to rely more heavily on nuclear power as a source of energy. I was also interested in the risks of working with radioactive materials, and how safe that is as of right now.

If I were to research hybrid cars, I would be interested to see if CO2 emissions from vehicles have been reduced since the cars were commercially introduced. I would also like to look into how they power themselves and what forms of energy most hybrid cars use to do that (this might be intuitive to some people, but I have no idea). From what I understand, hybrid cars are not perfect but they are good for the environment, and I would like to see how they compare with other cars.