Answer:
20% of the body's oxygen supply.
Explanation:
The brain represents just 2% of a person's body weight, yet it uses about 20% of the body's oxygen supply. Without it, the brain can't perform even the most basic functions. The brain relies on glucose to power the neurons that control everything from conscious functions like planning and thought to automatic, unconscious processes like managing heart rate and digestion.
Gray water is untreated waste water. You might use this water for flushing toilets
To Treat , To Cure, To Manage, To Prevent.
