Take surfactants, for example. They are an important ingredient in many cleansers, but since natural ones are more expensive and scarce many manufacturers use petrochemical ones. The commonly used nonyl phenol is an environmental hormone.
以界面活性劑為例，它是許多清潔劑的必要成分，但由於天然界面活性劑的成本較高，量也不足，因此很多廠商使用石化類的界面活性劑，而使用率相當高的「NP」（壬基苯酚）就是一種環境荷爾蒙。