This is the current version of the Rumen Microbiology peer review publication.  The Policy relevant technical summary was submitted to MPI in Feb 2021 (but attached for reference in this ROI submission).  As noted and agreed with MPI, this version is draft until Prof Rolf Thauer has provided his expert review and the journal has been selected and accepted as a final format. Two journals are been targeted for this publication: Trends in Microbiology and Animal Microbiome.  It is expected it will be at least end pf Sept 2021 before a decision is made by a journal. 