huánjìng wūrǎn

== Mandarin == === Romanization === huánjìng wūrǎn (Zhuyin ㄏㄨㄢˊ ㄐㄧㄥˋ ㄨ ㄖㄢˇ) Hanyu Pinyin reading of 環境污染 / 环境污染