  In this report we discuss three aspects: 1) Semiclassical gravity theory
(SCG): 4 levels of theories describing the interaction of quantum matter with
classical gravity; 2) Alternative Quantum Theories: Discerning those which are
derivable from general relativity (GR) plus quantum field theory (QFT) from
those which are not; 3) Gravitational Decoherence: Derivation of a master
equation and examination of the assumptions which led to the claims of
observational possibilities. We list three sets of corresponding problems
worthy of pursuit: a) Newton-Schr\"odinger Equations in relation to SCG; b)
Master equation of gravity-induced effects serving as discriminator of 2); and
c) Role of gravity in macroscopic quantum phenomena.
