by 
The Curious Bag
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Water allows our bodies to perform necessary functions and makes sustainable environments possible.
Structural Medium
Water literally makes us what we are. According to the Mayo Clinic, approximately 60 percent of the human body consists of water.
Metabolic Functions
The body's water supply acts both as a temperature regulation system and as a waste disposal medium, flushing toxic wastes the body for removal.
Mental Processes
Water performs a critical role in mental performance and brain function. Deprived of sufficient water, the brain's thinking power suffers, according to the European Journal of Clinical Nutrition.
Dehydration
If the body fails to replenish its water supply with about two liters of fresh water daily, dehydration can lead to kidney failure, seizures, and even death, according to the Mayo Clinic. The human body can survive for only about one week without water.
Global Impact
Water nourishes crops that feed both humans and animals. The United Nations General Assembly proclaimed the years from 2005 to 2015 the "Water for Life Decade" in a commitment to bring water to impoverished areas.
Source:
ECJN: Impaired Cognitive Function and Mental Performance in Mild Dehydration
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