本专栏讨论了美国一系列环境问题的最新进展 保护局农药项目办公室（OPP）宣布氯 天然气是一种限制使用的农药（RUP），需要处理厂 使用它作为消毒剂，至少有一种经过培训和认证的“杀虫剂” 在所有操作过程中都有“涂抹器”。在 给出了主题，并解释了联邦法律的要点 《杀虫剂、杀菌剂和灭鼠剂法》。

This column discusses the latest in a series of US Environmental Protection Agency's Office of Pesticide Programs (OPP) notices declaring chlorine gas to be a restricted-use pesticide (RUP) that will require treatment plants using it as a disinfectant to have at least one trained and certified "pesticide applicator" present during all operations. A listing of internet resources on the subject is given, along with an explanation of the essentials of the Federal Insecticide, Fungicide, and Rodenticide Act.