  We show that the Planck mass scale can be generated from conformal gravity in
the Weyl conformal geometry via the Coleman-Weinberg mechanism of dimensional
transmutation where quantum corrections stemming from the gravitational field
and the Weyl gauge field trigger the symmetry breakdown of a local Weyl
symmetry. It is also shown that the vacuum expectation value of a scalar field
is transmitted to a sector of the standard model through a potential involving
the scale invariant part and the contribution from the Coleman-Weinberg
mechanism, thereby generating the electroweak scale.
