There is the same amount of water on Earth as there was when the Earth was formed. The water from your faucet could contain molecules that dinosaurs drank. Water is composed of two elements, Hydrogen and Oxygen. 2 Hydrogen + 1 Oxygen = H2O.
Nearly 97 percent of the world’s water is salty or otherwise undrinkable. Another 2% is locked in ice caps and glaciers. That leaves just 1 percent for all of humanity’s needs — all its agricultural, residential, manufacturing, community, and personal needs.
Water regulates the Earth’s temperature. It also regulates the temperature of the human body, carries nutrients and oxygen to cells, cushions joints, protects organs and tissues, and removes wastes.
75 percent of the human brain is water and 75 percent of a living tree is water.
A person can live about a month without food, but only about a week without water.
Water is part of a deeply interconnected system. What we pour on the ground ends up in our water, and what we spew into the sky ends up in our water.
The average total home water use for each person in the U.S. is about 50 gallons a day.
Water expands by 9 percent when it freezes. Frozen water (ice) is lighter than water, which is why ice floats in water.