Water is the most common substance found on earth.
The only water we will ever have is what we have now. A person can survive without food for more than 30 days, but less than a week without water. A gallon of water weighs 8.34 pounds. For every 2.31 feet that water is raised above the earth s surface it can create one pound per square inch of pressure. For every 2.31 feet you are submerged below a body on water s surface there is 1 pound per square inch of pressure equally placed on your body.