User talk:75.144.27.51

I believe at least one of the references in this article needs to be re-sourced. Ref #9 no longer points to a 2008 DOE article, but to a 2017 DOE page. I believe this may have been as a result of the election of Donald Trump and his mandates about elimination of "inconvenient truths" in government documents. Hopefully, someone/some organization has saved referenced documents and these can be resourced in this, and presumably other, articles. I did not look at all the references so perhaps the originator of this article can evaluate any changes to determine their origin and determine how to fix the loss of critical information about this subject.