TY JOUR TI CURRENT PROBLEMS OF ENSURING THE SAFETY OF EXTREME TOURISM AND CONSTRUCTIVE APPROACHES TO THEIR SOLUTION KW safety KW extreme tourism KW tourism safety KW problematic issues JO Problems of risk management in the technosphere AU Yatsutsenko, V.N. AU Vorontsov, S.V. AU Zavodskov, G.G. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia