ives.

    In one sucudy, a doctor o breated quantities. tested. Unfortunately, as torappears not to  excreted as a e product. Rat accumulates int’s  so dangerous—and neitested. In consequence, lead was given a clean bill of h.

    Patterson quickly establis mospill do, in fact,since lead never goes a about 90 percent of it appeared to come fromautomobile ex pipes, but  prove it.  o comparelead levels in tmosp existed before 1923, raetroduced. It occurred to  ice cores could provide the answer.

    It  snoes into discrete annual layers(because seasonal temperature differences produce sligion from er tosummer). By counting back t of lead in eac global lead concentrations at any time for ion became tion of ice core studies, on wological work is based.

    Patterson found  before 1923 t no lead in tmosp since t time its level eadily and dangerously.   to get lead taken out of gasoline. to t end, ant and often vocalcritic of try and its interests.

    It o be a ion s directors  Justice Le Grosvenor of tional Geograpy.) Patterson suddenly foundresearc to acquire. troleum Institutecanceled a researcract ed States Public ral government institution.

    As Patterson increasingly became a liability to itution, trustees edly pressed by lead industry officials to s  o JamieLincoln Kitman, ing in tion in 2000, Etives allegedly offered to endoecterson  packing.” Absurdly, ional Researced to investigate tmospionably t on atmospheric lead.

    to  credit, Patterson never