On April 26, 1986, a reactor exploded at the Soviet-run Chernobyl Nuclear Power Plant, located some 90 kilometers north of Kyiv in Ukraine, killing 31 people immediately and another 15,000 over the next several years from radiation poisoning. In his appeal, Pope Leo warned about the risk of using increasingly powerful technologies. He expressed his hopes that discernment and responsible decision-making may be carried out regarding nuclear energy. “I hope that at all levels of decision-making, discernment and responsibility may always prevail, so that every use of atomic energy may be at the service of life and peace,” said the...