  The origin of carbon-enhanced metal-poor (CEMP) stars and their possible
connections with the chemical elements produced by the first stellar
generations is still highly debated. We briefly review observations of CEMP
stars in different environments (Galactic stellar halo, ultra-faint and
classical dwarf galaxies) and interpret their properties using cosmological
chemical-evolution models for the formation of the Local Group. We discuss the
implications of current observations for the properties of the first stars,
clarify why the fraction of carbon-enhanced to carbon-normal stars varies in
dwarf galaxies with different luminosity, and discuss the origin of the first
CEMP(-no) star found in the Sculptor dwarf galaxy.
