Effect of Power Plant Ash and Slag Disposal on the Environment and Population Health in Ukraine oleh Oleksandr Popov, Andrii Iatsyshyn, Valeriia Kovach, Volodymyr Artemchuk, Iryna Kameneva, Oksana Radchenko, Kyrylo Nikolaiev, Valentyna Stanytsina, Anna Iatsyshyn, Yevhen Romanenko