  I discuss the relationship between mass loss and nucleosynthesis on the
Asymptotic Giant Branch (AGB). Because of thermal pulses and possibly other
mixing processes, products of nucleosynthesis can be brought to the surface of
AGB stars, increasingly so as the star becomes more luminous, cooler, and
unstable against pulsation of its tenuous mantle. As a result, mass loss is at
its most extreme when dredge-up is too. As the high rate of mass loss truncates
AGB evolution, it determines the enrichment of interstellar space with the AGB
nucleosynthesis products. The changing composition of the stellar atmosphere
also affects the mass-loss process, most obviously in the formation of dust
grains - which play an important role in driving the wind of AGB stars.
