FIR and sub-mm line observations of AGB and post-AGB nebulae

The existing information on asymptotic giant branch (AGB) and post-AGB objects from FIR and submm spectroscopy is still scarce. Observations from the ground are often very difficult to calibrate and show low S/N ratios. However, we expect to obtain in the near future an impressive amount of high-quality data, from the Herschel space telescope. ALMA is also expected to provide high-quality maps of submm lines.