  We establish a new characterization of property (T) in terms of the
Furstenberg entropy of nonsingular actions. Given any generating measure $\mu$
on a countable group $G$, A. Nevo showed that a necessary condition for $G$ to
have property (T) is that the Furstenberg $\mu$-entropy values of the ergodic,
properly nonsingular $G$-actions are bounded away from zero. We show that this
is also a sufficient condition.
