TY JOUR TI On the concept and content of the pollution prevention principle in international environmental law: theoretical and legal aspects KW International law KW ecology KW climate KW sustainable development KW principle of law KW pollution prevention JO Bulletin of the Kaliningrad branch of the Saint-Petersburg University of the Ministry of Internal Affairs of Russia AU Ryzhenkov, A.Y. AU Matancev, I.V. PY 2026 IS PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION