These are three papers by Jerry Decker (KeelyNet) that I believe are worth reading. I choose to post this links under the General topic because they are relevant to all sections of this site. As ZPEnergy is just taking shape, Jerry’s thoughts provide a good introductions to the intricacies of the subject and a starting point for comments, hopefully of a pragmatic nature.
http://www.keelynet.com/primer.htm
http://www.keelynet.com/differ.htm
http://www.keelynet.com/pop.htm