Dastgir 12/01/2010 12:41:16 Inherent moisture Dear All,Is this true that this is the inherent moisture of the coal which renders it the property of spontaneous combustion?If true, then it is really interesting. Please explain for this paradox. Regards,Gulam Dastgir Michael Clark 13/01/2010 09:26:00 Coals with high inherent moisture are younger coals with higher volatile content. It is not the moisture that renders them susceptible to spontaneous combustion.