  The talk is about the power corrections in QCD. Renormalons, both infrared
and ultraviolet, provide with a kind of a kinematical framework to fix
exponents of the leading power corrections to various observables. Any viable
dynamical framework is to reproduce this pattern of the power corrections. In
this mini-review, we emphasize that a simple dynamical framework satisfying
this requirement may well be provided by the strings inherent to the Abelian
Higgs model. This model comes naturally into consideration within the U(1)
projection of QCD which makes explicit the dual-superconductor model of the
confinement. At large distances (compared to $\LQ^{-1}$) there are
Abrikosov-Nielsen-Olesen strings which develop a characteristic
non-perturbative transverse size of order $\LQ^{-1}$ and match in this way the
infrared renormalons. At short distances there are no ANO strings but there
still exist dynamical manifestations of the stringy topological condition that
(external) quarks are connected by a mathematically thin line along which the
vacuum is trivial. These manifestations may match ultraviolet renormalons.
