I know this is very hard for this forum to consider at times, but the world is not only the US, and the question about what do with coal, oil, and gas is a global, not a US problem. United States is a somewhat lucky outlier when it comes to energy production. Unfortunately, even in other currently lucky nations, the public sentiment is strongly against nuclear power.
In 2013 91.6% of the energy cames from CO2 producing sources[1], and nuclear production is decreasing[1], having peaked in 2005.
The exact percentage, whether it's 91.5% or under 60% doesn't even matter though, what matters is that fossil fuel burning is increasing in absolute terms[1].
[1] http://www.iea.org/publications/freepublications/publication...