  We study transport in a class of physical systems possessing two conserved
chiral charges. We describe a relation between universality of transport
properties of such systems and the chiral anomaly. We show that the
non-vanishing of a current expectation value implies the presence of gapless
modes, in analogy to the Goldstone theorem. Our main tool is a new formula
expressing currents in terms of anomalous commutators. Universality of
conductance arises as a natural consequence of the nonrenormalization of
anomalies. To illustrate our formalism we examine transport properties of a
quantum wire in (1+1) dimensions and of massless QED in background magnetic
field in (3+1) dimensions.
