TY JOUR TI EXPERIMENTAL AND COMPUTATIONAL STUDY OF POLLUTANTS SPREAD FROM MODEL GRASS FIRE SPOTS KW emergencies KW grass fires KW smoke KW carbon monoxide KW fine particulate matter KW modeling pollutants dispersion in the atmosphere JO Problems of risk management in the technosphere AU Lozhkina, O.V. AU Orlovtsev, S.V. PY 2025 IS 2025 PB Saint-Petersburg University of State Fire Service of Emercom of Russia