Solar and wave power(kind of ironic) can produce vast amounts of energy as can wind turbines so generation is not exactley a problem.Implementing is as it cost alot of money but once they are in place these turbines and other forms need very little maintence and have very little chance of blowing up.Also there isnt a dependency on fuels that will run out eventually.
but what do you do in countries that aren't sunny a lot of the time and countries where there isn't very much wind. Nuclear power produces monumental times of energy compared to wind and sun.