  In general relativity, inertia and gravitation are both included in the
Levi-Civita connection. As a consequence, the gravitational action, as well as
the corresponding energy-momentum density, are in general contaminated by
spurious contributions coming from inertial effects. In teleparallel gravity,
on the other hand, because the spin connection represents inertial effects
only, it is possible to separate inertia from gravitation. Relying on this
property, it is shown that to each tetrad there is naturally associated a spin
connection that locally removes the inertial effects from the action. The use
of the appropriate spin connection can be viewed as a renormalization process
in the sense that the computation of energy and momentum naturally yields the
physically relevant values. A self-consistent method for solving field
equations and determining the appropriate spin connection is presented.
