July through September 2002 in Central Russia was characterized by severe fire smoke conditions that led to high concentrations of atmospheric aerosols and gaseous species. A combination of a unique meteorological regime exacerbated the occurrence of the fire events in Moscow area and led to smoke conditions in Moscow itself. During the smoke episode, a complex program of aerosol, several gaseous species, and broadband solar radiation measurements was in operation at Meteorological Observatory of Moscow State University (MOMSU) and at its site in a Moscow suburb (50km to the west) at the MSU Zvenigorod biostation. During the same time a complex program of observations of forest herbaceous plant phenology and induced plant injury has been in operation at Zvenigorod. We analyzed this unique smoke intrusion event from both an atmospheric and plant ecology consequence viewpoint. In this study we examined several aspects of the observed fires: the conditions in which they occurred, their direct influence on air quality, specific features of radiation transmittance and radiative effects in fire smoke conditions. These effects may in turn intensify forest fires via additional absorption of solar irradiance that lead to the changes of temperature gradients in the boundary layer and, hence, additional increase of the atmosphere stability. We also analyzed the indirect effect of forest fire on plant injury, which deals with the changes in air composition (increase in surface ozone concentration). Finally, the corresponding changes in forest herbaceous plant phenology, which occurred in the area with extremely high fire indices and large potential of forest fires were examined.