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of ~ynthetic rubber; 25,000 Rallon~ to make a ton of stedi 300 R:.dluns to make one loaf of bread, and 4,000 gallons to provide one pound of beef. WATER USE IN UNITED STATES - BHEon, of g,lIons pee day: 1967 ]980 32 39 73 1]5 ] 19 162 ]48 178 Public \Vater Supplies Indumy Steam Power Plants Agriculture '. There is the ~ame amllunt of water on earth today as when it was created three billion years ago. It is estimated that one billion IOns of sediment are w<lshed into the seas each year; sufficient to bury VVashington, D. C. under 10 feet. Hydrological Cycle: I. \Vater on earth ~urface is heated and evaporates. 2. Evaporated water rises, cools. forms clouds. 3. Panicles in clouds grow until they fall as snow or rain. 4. Some rain or snow soaks into Ihe earth. 5. Some rain and snow falls into streams, lakes and oceans. Hydrological cycle has no beginning - no end. At any given moment 3,100 cubic miles remain floating in clouds, equivalent to one inch of rain over entire earth every two weeks. Each year, 95,000 cubic miles of moisture ascends into the atsmophere; 71,000 of which falls back into the seas and oceans; 15,000 strikes land, and the remainder falls into lakes, ri~'ers, etc. One acre of corn may deliver 4,000 gallons per day into the atmosphere, and olle cottonwood tree may deliver 1,500 gallons per day. There is enough water locked up in [he Antartic Icecap to feed Ihe Mississippi River for 50,000 years. The melted ice could match flow of all rivers for about 800 years. At anyone time, the rivers conlain only about 1/1 00 of one per. cent of the water on Ihe globe. The amount of w,lter underground IS 3,000 times larger than all {he water 111 all the Tlvers 111 the world, and 20 times larger than in all lakes or inland seas. Human blood is 80 10 90% wateri muscles about 75%; and bones 20%. Each day man loses 8 pints of water and can suffer to lose no more than l/lOth of {he water supply in the body before it becomes fatal. 2/3 of the human body consists of water. Bread contains 35'j" water; meats up to 700/.-;; and fruits (toma- to) up to 95%. : ~ '.' ,~