Question

Please answer the 3rd one.
(Please try to give a short answer)​

Answer 1

3) Plants clean the air through the process of photosynthesis. As humans breathe in oxygen and breathe out carbon dioxide, plants do the opposite. They absorb light, carbon dioxide, and water to manufacture sugar. This chemical process creates oxygen as a byproduct

Answer 2

One major purpose of water purification is to provide clean drinking water. ... The purification procedure reduces the concentration of contaminants such as suspended particles, parasites, bacteria, algae, viruses, and fungi.

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