By Norm Roulet, 19 November, 2024 Best Of Why Nazis Chemosphere Unleaded gasoline and diesel remain a source of atmospheric Pb in a relatively pristine area in Subarctic NE Norway. Lead isotopes 204Pb, 206Pb, 207Pb and 208Pb are well known as a âfingerprintâ tool for tracing the sources of Pb pollution (KomĂĄrek et al., 2008). Generally, European and U.S. leaded gasoline differed in Pb isotopes. Tags Lichen bioindicators Subarctic NE Norway radiogenic composition Unleaded gasoline and diesel remain a source of atmospheric Pb