Lengthy, detailed 20yo article: "The Secret History of Lead" (Nation, original gone) [https://web.archive.org/web/20090208070616/https://www.thenation.com/doc/

Lengthy, detailed 20yo article: "The Secret History of Lead" (Nation, original gone) [https://web.archive.org/web/20090208070616/https://www.thenation.com/doc/20000320/kitman https://web.archive.org/web/20090208070616/https://www.thena...] The part I'll never forget reading (page 2): "For this reason, most of the estimated 7 million tons of lead burned in gasoline in the United States in the twentieth century remains--in the soil, air and water and in the bodies of living organisms. Worldwide, it is estimated that modern man's lead exposure is 300 to 500 times greater than background or natural levels."