#Radioactive cloud over Europe had civilian background
“#Radioactive cloud over Europe had civilian background” The scientists carried out the isotope measurements using such air filters. Credit: Dorian Zok/LUH A mysterious cloud containing radioactive ruthenium-106, which moved across Europe in autumn 2017, is still bothering Europe’s radiation protection entities. Although the activity concentrations were innocuous, they reached up to 100 times the levels…