(June 30, 2023, 10:38 AM EDT) -- EAST ST. LOUIS, Ill. — In one of multiple cases opened on the same day in a multidistrict litigation in Illinois federal court, a man with Parkinson’s disease on June 29 sued the chemical companies contending that they knew, or should have known, that the pesticide paraquat is “a highly toxic substance that can cause severe neurological injuries.”...