| http://www.w3.org/ns/prov#value | - Residues from the pesticide lead arsenate, once used heavily on apple, pear, and other orchards, contaminate an estimated 70,000 to 120,000 acres in the state of Washington alone, some of it in areas where agriculture has been replaced with housing, according to state ecology department officials and others.Lead arsenate, which was not banned for use on food crops until 1988, nevertheless was most
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