1.

*When water becomes unclean and poisonous due to mixing of natural or artificial unwanted material, the amount of ___________ decreases.*1️⃣ Nitrogen2️⃣ Oxygen3️⃣ Hydrogen4️⃣ Carbon dioxide

Answer»

Explanation:

When water becomes unclean and poisonous due to MIXING of natural or ARTIFICIAL unwanted MATERIAL, the amount of ___________ decreases.*

1️⃣ Nitrogen

2️⃣ Oxygen

3️⃣ Hydrogen

4️⃣ Carbon DIOXIDE



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