This aerial photo shows a dam and garbage floating in the Drina river near Visegrad, eastern Bosnia, Wednesday, Feb. 24, 2021. Environmental activists in Bosnia are warning that tons of garbage floating down the Balkan country's rivers are endangering the local ecosystem and people's health. The Drina River has been covered for weeks with trash that has piled up faster than the authorities can clear it out. (AP Photo/Kemal Softic)