What a broad topic we have on the table for the upcoming discussion. As with all of our topics, our discussions will be updated and ongoing from dinner to dinner. Below I offer a few links for reference:
A very comprehensive site is available from the Energy Information Administration which publishes the official energy statistics from the US government. 2006 is the last published edition. Charts galore, here!
The ubiquitous Wikipedia serves up a good page which as with some of their topics is a work in progress. Here you get excellent graphics which are worth a thousand words. Check it out.
Back to the government for the third reference, at National Atlas. This is a fairly good descriptive article on US renewable energy sources.
The issues are economic, environmental, political, international in nature and all with national security aspects.