Bacteria undergo an asexual process of cell splitting called binary fission. this process is genetically similar to

Mitosis

Mitosis and meiosis are simply cell division processes that occurs differently, they're characteristically divergent from each other according to their function and structure.

Mitosis is the cell division that happens in all cells in the human body except sperm and egg cells. They produce diploid cells. 

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Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.