This document discusses several European Union-supported projects focused on sustainable management of natural resources across borders. It describes projects aimed at improving energy efficiency, developing renewable energy, protecting water resources and managing waste. Specific projects highlighted include developing common models for reducing energy use in municipal buildings in Poland and Russia, installing solar energy and biomass equipment in Poland and Ukraine, extending sewage treatment systems along the Bug River between Poland and Belarus, and fostering partnerships for cross-border water protection among Poland, Lithuania and Russia. The document emphasizes how such cross-border cooperation projects can promote sustainable development, reduce environmental threats, and improve quality of life in border regions.