  In this note, we present our recent analyses of the thermodynamic properties
of the glueball resonance gas. We observe that the dominant contribution to the
thermodynamic quantities, such as pressure, trace anomaly, and entropy, is
coming from the free glueball gas with the states of positive charge
conjugation (i.e., pomeron). A comparison of pomeron states obtained from LQCD
and functional methods within the glueball resonance gas model is also
presented.
