  A new protocol for linearization of the Poisson-Boltzmann equation is
proposed and the resultant electrostatic equation coincides formally with the
Debye-Huckel equation, the solution of which is well known for many
electrostatic problems. The protocol is examined on the example of
electrostatically stabilized nano-bubbles and it is shown that stable
nano-bubbles could be present in aqueous solutions of anionic surfactants near
the critical temperature, if the surface potential is constant. At constant
surface charge non nano-bubble could exist.
