加州已宣布禁用百草枯，这是一种高毒性除草剂，目前已在70多个国家遭禁，包括中国、英国和欧盟[1]。该禁令源于2024年州立法要求对该物质的健康风险进行重新评估[1]。作为美国最大的百草枯使用地，加州此举标志着美国对这一化学品的管制不断加强，该州也成为继佛蒙特州后第二个禁用该物质的州[1]。
科学证据表明百草枯与多种严重疾病相关联[1]。研究显示该除草剂与帕金森症、甲状腺疾病、生殖伤害和出生缺陷存在关联[1]。制造商新先达公司已于2024年4月撤销了其加州使用许可[1]。尽管美国环保署在2021年和2024年重新批准了百草枯的使用，但加州的禁令将分两年逐步实施[1]。目前约1400万磅的百草枯每年在美国喷洒[1]。
California has announced a ban on paraquat, a highly toxic herbicide that has already been prohibited in more than 70 countries, including China, the United Kingdom, and the European Union [1]. The decision comes following a 2024 state legislative requirement to reassess the health risks associated with the substance [1]. California is the largest user of paraquat in the United States, making it the second state to implement such a ban after Vermont [1].
The herbicide has been linked to multiple serious health conditions, including Parkinson's disease, thyroid disease, reproductive harm, and birth defects [1]. Approximately 14 million pounds of paraquat are sprayed annually across the United States [1]. The ban will be phased in over two years [1]. The manufacturer Syngenta withdrew its use authorization in California in April 2024 and has ceased production of the product [1], even as the U.S. Environmental Protection Agency reapproved paraquat use in both 2021 and 2024 [1].