النتائج (
الإنجليزية) 3:
[نسخ]نسخ!
Types of water pollution [Edit]1. Natural pollution, which has altered the natural properties of water, making it invalid.2. It"s a chemical pollution: as the waterproof effect is the result of a Kmyayyt toxic materials such as lead.3. The bacterial contamination: where there is pathological microorganisms in water
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