(introduction...)

So far, the areas of problems in biogas dissemination have been described. These are to assist in preparing coordinates for the assessment of a location for a project. It has been shown how biogas dissemination requires definite background conditions for its success. The reality of a location will be shown by favourable and unfavourable factors. It is the job of the expert to judge this mixture in favour of or against possible biogas dissemination.

Following, are the criteria which make biogas dissemination impossible or more difficult. The ideal project location will rarely be found. The "ideal conditions" stated are to make the individual factors clearer.