“…Based on the protocol outlined by Bau and Duski 20 using inductively coupled plasma mass spectrometry (ICP‐MS), groups studying densely populated and industrialized areas in Australia, 22,23 the USA, 24,25 Czech, 26 Sweden, 20 South Korea, 27 Germany, 28,29 France, 30,31 England, 29 Japan, 32,33 Brazil, 34 China, 35 Turkey, 36 and West Africa 37 have shown Gd anomalies in their rivers, lakes, and oceans. Groups 20,23,31,38–43 have compared samples from waters upstream and downstream of WWTPs and confirmed that Gd anomalies originate in WWTP effluents and are therefore of anthropogenic origin.…”