On the Variation of Gas Depletion Time
  We present an updated status of the EDGE project, which is a survey of 125
local galaxies in the $^{12}$CO($1-0$) and $^{13}$CO($1-0$) lines. We combine
the molecular data of the EDGE survey with the stellar and ionized gas maps of
the CALIFA survey to give a comprehensive view of the dependence of the star
formation efficiency, or equivalently, the molecular gas depletion time, on
various local environments, such as the stellar surface density, metallicity,
and radius from the galaxy center. This study will provide insight into the
parameters that drive the star formation efficiency in galaxies at $z \sim 0$.
