Nuclear has to be the best answer, with research into disposing of the waste in a way that makes it non radio active, rather than just dumping or hiding it somewhere.
I'm glad I'm not the only one that thinks so, wind and solar are ok on a small scale, for individual dwellings but large scale............no, its a sop to the yoghurt weavers, the average wind generator consumes about 5,000 tons of concrete (and we all know how carbon neutral that isn't) in its mounting base alone! and as for solar well P.V. is ok but I don't think we get enough decent sunshine here too look at large scale water heating to drive generators!
If you look at the major nuclear disasters that have happened I think you'll find that they have been down to operator error, illegal experiments and poor siting. Taken as a whole, the nuclear energy industry is safe, more miners are killed in China for example, and the cost of winning oil from under the ground is getting more and more expensive/dangerous!
I do have a solution to disposing of said waste - its a bit radical, but, you see we have a mahoosive chain reaction going on at the center of our universe (yup the sun) and LOTS of festering missiles dotted about the place....................do I have to spell the rest out?
Better to regret something you have done - than to regret something you have not done.