Professor Chen Zuengsang of Taiwan University's Department of Agricultural chemistry adds that, "If you use little and understand little, this does not represent that something is not a pollutant." There are still many hidden properties of metal compounds that destroy the environment.
「用得少、對它瞭解少，並不代表它就沒有汙染」，台灣大學農業化學系教授陳尊賢也指出，金屬化合物中，還有許多深藏潛力的環境破壞者。