Environment & Ecology · Environment
वाहित मल संस्थान का मुख्य उद्देश्य क्या है?
- 1पानी में ऑक्सीजन की मात्रा कम करना
- 2पानी का तापमान बढ़ाना
- 3पानी से प्रदूषकों को हटाना✓
- 4पानी का रंग बदलना
सही उत्तर देखें
पानी से प्रदूषकों को हटाना
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