Revealed: the undisclosed safety data emerging as weedkiller maker faces Parkinson’s lawsuits in US
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https://www.theguardian.com/environment/ng-interactive/2026/sep/25/syngenta-paraquat-parkinsons-lawsuits-epa
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Syngenta denies keeping relevant data from the EPA as paraquat stays in the US market despite global bans Sweden started ringing the alarm bell more than 20 years ago, calling for a ban on the weedkilling chemical paraquat in 2004. One by one, dozens of other countries did the same as evidence of paraquat risks to human health mounted. Even the Chinese government, which owns the longtime paraquat maker Syngenta , halted domestic use of the pesticide a decade ago after conducting its own studies on paraquat safety and finding troubling results. In the US, two states – Vermont and California – have recently also banned paraquat, citing risks that include an association between paraquat and Parkinson’s disease shown in years of scientific research. And California regulators announced in Augu…
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