Even though both are considered "green energy," wind has been the chosen energy source for U.S. energy policy lately. With the extension of the wind energy tax credit in 2012, the industry witnessed record capital expenditures. This build-out has been taking its toll on the likes of Exelon (NYSE:EXC) and Dominion Resources (NYSE:D) due to their inability to shut down nuclear power generation during off-peak demand. 

Many expect the proliferation of wind and solar energy to continue, especially as state mandates start to kick in regarding renewable energy usage. Based on this outlook, nuclear and coal power generators are likely to continue suffering unless subsidies are curbed and natural gas prices begin to rise.

For more on the current and prospective spending in this sector, watch the video below.