clean的名词形式

　　School is my home, cleanness depends on everybody.

　　学校是我家，环境靠大家。

　　Strengthen the control over cleanness and pollution.

　　应加强对产品的清洁和污染控制。

　　Solar energy is accepted commonly for its advantages such as economic and cleanness.

　　太阳能以其经济、清洁等优点倍受青睐。