I also enjoyed the article.  This is a question for the site editors.  I teach an energy unit in one of my freshman classes and would like to use some of the excellent research posted on TOD as reading assignments (this article is a good example).  Looking over the site, I don't see an easy way to find archived material indexed by subject.  For example, Wind, Coal, (Coal to Liquid), Saudi production, Shale, Nuclear, Conservation, etc.
Have I missed a way to do this?  Would this be an impossible task?

One of the best features of TOD, IMO, is the ratio of fact/opinion ratio tends towards the high end - though I enjoy reading many of the opinions as well - making it one of the more valuable and educational blog sites.  

We link some of the posts by reference at the end  - for example those on petroleum production, and mining , and I will generate a link between the parts of this series beginning with the next post (though there will only be about 6 in the series - since I don't plan to emulate Robert Jordan).

We do try putting tags at the top of the posts, but that depends on the author and sometimes it is difficult to decide what should, and should not, be included.