epa10134875 Aeration action on Lake Dabie in Szczecin, western Poland, August 23, 2022. Volunteers with the help of water scooters and other vessels are trying to agitate the water over as much of the body of water as possible. The lack of oxygen in the water is related to the weather, lack of wind, rain and high temperatures, among other factors. EPA/Marcin Bielecki POLAND OUT