We propose to study circumstellar envelopes in the newly discovered
dwarf spheroidal Sgr. It is the nearest extra-galactic system (half
the distance to the LMC) and is the only old, metal-poor stellar
population where we can study in detail the mass-loss process.  The
relatively simple star-formation and chemical history will allow us to
measure the mass-loss efficiency for a narrow range in metallicity and
stellar age, and will provide a crucial comparison sample compared to
the younger, more metal-rich Magellanic Clouds. We will carry out
mid-infrared photometry to detect circumstellar envelopes and measure
the mass-loss rate. We will also observe the two planetary nebulae
with SWS, to measure accurate abundances. Both planetary nebulae in
Sgr have [WC]-like central stars, indicating an unexpected
difference in stellar population with the Galactic halo.