In the first few hours of the Chernobyldisaster, lethal forms of iodine and cesium were released into the atmosphere. They were accompanied by other highly dangerous radioactive emissions.

在切尔诺贝利事故最初的几个小时内，以碘和铯为主要构成的致命污染物融入了大气，它们之中附带着辐射量极高的放射性污染物。