The average atmospheric concentration of krypton-85 was approximately 0.6 Bq/m3 in 1976, and has increased to approximately 1.3 Bq/m3 as of 2005.
Průměrná koncentrace 85Kr v atmosféře byla roku 1976 asi 0,6 Bq/m3 a roku 2005 asi 1,3 Bq/m3.