Explain the process of sewage water treatment before it can be discharged into natural water bodies . Why is this treatment essential ?

Explanation

### Step-by-Step Text Solution

**1. Introduction to Sewage Water Treatment:**
- Sewage water treatment is essential to prevent pollution of natural water bodies caused by the discharge of untreated sewage. The growing human population generates large volumes of sewage, which includes domestic waste and industrial effluents.

**2. Importance of Treatment:**
- Untreated sewage can severely harm aquatic ecosystems. It introduces organic waste and harmful substances into water bodies, leading to:
- Poisoning of aquatic organisms, including fish.
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