it is a cheap method of sewage disposal it is a hygienic method nutrients and trace elements required by plants are available in sewage it is abundantly available
Answer Discuss in Comment
"Scientists dream about doing great things. Engineers do them."
PSC Advertisement ⏩ | Federal PSC | Bagmati PSC | PSC Karnali | PSC Lumbini | PSC Sudurpaschim | PSC Gandaki | PSC State 1.
