TY JOUR TI INVESTIGATION OF IMPACT OF SMOKE FROM BURNING GRASS ON VISIBILITY OBSTRUCTION AND ROAD ACCIDENTS KW emergencies KW grass fires KW smoke KW aerosols KW reduced visibility KW road accidents 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