well, nuclear power is one option, but there are
... less dangerous ones. Take a mix of solar, wind, water power (not just dammed rivers and such, also tidal).
That does not work yet, take Germany as counterexample. With its green energy policy it in 2013 managed in to increase its CO2 emissions while most of europe decreased its emissions, only Denmark, Estonia, Portugal have bigger increase. http://phys.org/news/2014-05-g
Of course that is ignoring that in 2013 Germany still emitted less CO2 than any year up to 2008 (for several decades) - when all NPPs still were running at full power.
Which is again misleading as emissions decreased everywhere in developed world. That drop could be explained by better insulation and other improvements in efficiency.
If you compare germany with rest of europe then between 2007 and 2012 germany dropped just by 3% while EU average is 12% drop and even USA dropped more.
Germany does two steps forward, one step back. It could do much better if it had sensible energy policy.