  The recently proposed Holography-inspired approach to quantum gravity is
reviewed and expanded. The approach is based on the foliation of the background
spacetime and reduction of the offshell states to the physical states. Careful
attention is paid to the boundary conditions. It is noted that the outstanding
problems such as the cosmological constant problem and black hole information
can be tackled from the common thread of the quantized gravity. One-loop
renormalization of the coupling constants and the beta function analysis are
illustrated. Active galactic nuclei and gravitational waves are discussed as
the potential applications of the present quantization scheme to astrophysics.
