We report on a study of the natural warm inflationary paradigm (WNI). We show
two important new results arise in this model. One is that the observational
constraints on the primordial power spectrum from the cosmic microwave
background (CMB) can be satisfied without going beyond the Planck scale of the
effective field theory. The second is that WNI can inevitably provide perfect
conditions for the production of primordial black holes (PBHs) in the golden
window of black-hole mass range ($10^{-16} -10^{-11}M_{\odot}$) where it can
account for all of the the dark matter content of the universe while satisfying
observational constraints.
