While renewable energy still has a long way to traverse before it competes on an apples-to-apples basis with hydrocarbon-based fuels, plenty of inroads have been built. Still, Southern  (NYSE:SO) CEO Tom Fanning recently outlined three limitations with renewable energy. Holding back the sector are long distances from demand centers, intermittent supply, and government subsidies.  

Some recent players in the solar industry are working to solve the first problem, but more uncertainty surrounds the later two. Check out the following video for more insight into the future sustainability of renewable energy sources. 


Joel South and Taylor Muckerman have no position in any stocks mentioned. The Motley Fool recommends Exelon and Southern. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.