The physics of massive stars depends (at least) on convection, mass loss by
stellar winds, rotation, magnetic fields and multiplicity. We briefly discuss
the impact of the first three processes on the stellar yields trying to
identify some guidelines for future works.Comment: 8 pages, 6 figures, in press for the proceedings of IAU Symposium
334, Rediscovering our Galaxy, C. Chiappini, I. Minchev, E. Starkenburg, M.
Valentini ed