Scientists are closing in on an inescapable conclusion: Pesticides may be a cause of Parkinson's disease

Jackie Christensen was 32 when her body began to betray her. She had just returned to work after the birth of her second son and when she tried to type, two fingers on her left hand refused to cooperate. "They wouldn't go where I would want them to on the keyboard," says Christensen, who at the time -- it was 1997 -- was co-director of the food and health program at the Institute for Agriculture and Trade Policy, a Minneapolis think tank. "I also had what they frequently call frozen shoulder, with a very low range of motion in my left arm."
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