Comment on paper "Extremely Low Frequency Plasmons in Metallic Mesostructures" [J.B. Pendrey, et al., Phys. Rev. Lett. 76, 4773 (1996)]
A first-principle theory for the effective dielectric permittivity in metallic mesostructures is developed. This theory, in particular, takes into account the skin effect, which is important in practical applications of metal structures.