The latest thematic file on EU legislation over at the legal portal Eur-Lex is Renewable energy (posted 26 June 2009).
Overview of EU law
Thematic files are collections of legal documents on specific fields of EU activity (legislative instruments, preparatory acts, case law, parliamentary questions, etc.).
The idea is not to be exhaustive but rather to group together the most relevant current legislation on the subject in question.
You can consult related acts and/or acts amending original acts in the bibliographic entry for each document.
The thematic files are handy references for everyone interested in a particular policy area.