  The light hadron spectrum as computed in nonperturbative QCD is reviewed and
compared to lattice data and experiment. The mixing of mesons, hybrids and
glueballs is calculated in the Field Correlator Method. The strong decay
mechanisms are found out in the method and compared to the known
phenomenological models. The role of sea quarks (unquenched approximation) is
studied analytically using radially excited mesons as an example, and compared
to experiment.
