promotion image of download ymail app
Promoted

Why rainwater also needs to treated????

Rain is formed after evaporation and condensation. It should be clean. However, rainwater also needs t be treated. Why?

1 個解答

評分
  • 1 十年前
    最愛解答

    因為落雨時,雨水會mix埋空氣中的雜質.......e.g.CO2 in air dissolves in rainwater to form carbonic acid等,降低左pH,變左acid rain........

    空氣中有各種漂浮的particulates......等等都可能會mix埋係雨水到........

    而且雨水又唔係直接落入飲用水個塘,可能中途經過d地方,which is contaminated.........

    資料來源: 推論
    • Commenter avatar登入以回覆解答
還有問題嗎?立即提問即可得到解答。