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<br />of ~ynthetic rubber; 25,000 )<\alJons to mak~ a ton of steel; 300 <br />~allons III make (me loaf of bread; and 4,000 g,dlons to provide <br />one pound of beef. <br /> <br />WATER USE IN UNITED STATES' Billions of 8,1100< pee <br />day: <br /> <br />Public \Vi:lter Supplies <br />Industry <br />Steam Power Plants <br />Agriculture <br /> <br />1967 <br />32 <br />73 <br />119 <br />148 <br /> <br />1980 <br /> <br />39 <br />115 <br />162 <br />178 <br /> <br />There I~ the same amount of water on e<lnh today as when it <br />was created three bIllion yetl!S ago. It is estimated that one bilh\.m <br />tollS uf ~ediment <Ire wdshed into the seas each year; sufficient <br />to bury Washington, D. C. under 10 feet. <br /> <br />Hydrological Cycle: <br /> <br />1. \Vater un earth surface is he<lted and e\'apor<ltes. <br /> <br />2. EVilpor.Hed wilter rises. cools. forms clouds. <br /> <br />3. Panicles 111 clouds grow until they fil]] ~s snow or rain. <br /> <br />4. Some r<lin or snow soaks imo the earth. <br /> <br />5. Some rain and snow falls imo streams, lakes and oceans. <br /> <br />Hydrologic<l] cycle has no beginning - no end. <br /> <br />At any given moment 3,100 cubic nllles remain floating in <br />clouds, equivalent to one inch of rain over entire earth every <br />tWO weeks. <br /> <br />Each year, 95,000 cubic mdes of moisture ilscends into the <br />atsmophere; 71,000 of which falls back into the seas and oceans; <br />15,000 strikes land, <:lnd rhe remainder f,llls into hikes, rivers, etc. <br />One acre l\f corn may deliver 4-,000 gallons per day into the <br />atmosphere. and one cottonwood tree may deliver 1,500 gallons <br />per d<lY. <br />There is enough water locked up in the Anl<lrtic Icecap to feed <br />the Mississipl?i River for 50,000 years. The melted ice could <br />match flow of all rivers for about 800 years. <br />At anyone time, the rivers contain only about 1/100 of one per- <br />cent of the Welter on the globe. <br />The amount of water underground is 3.000 times larger than <br />all the water in <III the rivers in the world, and 20 rimes larger <br />th<ln in all lakes or inland seas. <br /> <br />Human blood is 80 to 90'7c WHer; muscles about 75%; :::md <br />bones 20%. Each day man loses 8 pints of water and can suffer <br />to lose no more than II lath of the W<:lter supply in the body <br />before it becomes fatal. 2/3 of [he hum<ll1 body consists of water. <br />Bread contains 35%) water; me<:lts up to 701..; and fruits (toma- <br />10) up to 95%. <br /> <br />- .~ <br /> <br />o <br />c:--; <br />N <br />o <br />W <br />(J'l <br />