  This paper reviews the evidence for interaction between radio jets and their
environment in small and intermediate (sub-kpc) scale radio sources.
Observations of gas (both neutral hydrogen and ionised gas) have shown the
presence of fast (> 1000 km/s) outflows likely originating from this
interaction. The characteristics of these AGN-driven outflows (e.g. mass
outflow rate) indicate that they may have a relevant impact on the evolution of
the host galaxy. We also report on the detection of large HI disks found around
the host galaxies of nearby compact radio sources. Similar structures have so
far not been detected around large radio sources. The presence of these
structures in relation to the evolution of young compact radio sources is
discussed.
