Information on the ozone concentration in the surface air and troposphere in the first half of 2020 is presented. The data were acquired at 13 stations in different Russian regions; vertical distributions were obtained with the use of an aircraft laboratory. The excess over the Russian Federation hygienic standards is assessed; the daily average ozone concentration is found to be regularly higher the maximum permissible concentrations at most stations. At some stations, there are features the seasonal variations in the ozone concentration in the period under study different from previous years.

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We present information on ozone concentration in the surface air layer in the second half of 2020. Data were obtained at 13 stations located in different regions of Russia. We estimated the excess over hygienic standards of the Russian Federation, both in the second half of the year and throughout 2020. It is shown that the daily average maximum permissible concentration of ozone is regularly exceeded at all stations. There are cases of exceeding the one-time maximum permissible concentration.

The spectra of enhanced hyper-Raman scattering (Hyper RS) by symmetrical molecules studied in the literature are analyzed on the basis of the dipole-quadrupole theory of surface-enhanced Hyper RS of light and the concept of the existence of a strong quadrupole interaction of light with the molecules. It is shown that the theory predicts the appearance of forbidden lines in the enhanced Hyper-RS spectra (in molecules with sufficiently high symmetry), caused by totally symmetric vibrations and transforming according to a single irreducible representation. A consideration of the experimental spectra of phenazine, pyrazine, and pyridine confirmed the existence of the indicated forbidden lines and made it possible to explain the features of the spectra of these molecules. A critique is presented of the theoretical analysis of the enhanced Hyper-RS spectra of trans-1,2-bis(4-pyridyl)ethylene and crystal violet carried out by other authors.