Layers of clay and rock seal water bearing soil into channels, “rivers,” veins or aquifers.  In US locations layers of water bearing strata are often found with the deepest levels having waters of great antiquity.  The age of recovered water is one characteristic water purveyors have missed in their amazing marketing of something you can get virtually for free!  Determining the age of water is a matter of knowing the depth from which it has come and the rate it moves throught layers of rock and soil. Geologists determine these factors with dyes injected to certain depths.

There are underground aquifers under unlikely places like the Nevada and Arizona deserts.  Water there may not be sufficient for crops like corn and wheat.  Both use large amounts of water when the atmosphere is their source of carbon.  SCAF will reduce the water demand 30% to 50% for today's  plants and all the way down to 4% of what it is now with genetically engineered plants.

Some will see threats of disasters and falling skies in the change to plants more dependent on man, but this is something that has been going on for many thousands of years.  The wheat we use for bread does not occur in nature. It was derived from two different plants that were crossed by putting the pollen from one on the unfertilized seeds of the other.  This was done to make a plant that would hold its' seeds for us to harvest rather than have them blow away like ordinary grasses. As a result there is more wheat growing now than if it were a wild plant.  

 In arranging for a better, more convenient to the plant, more effieicnt way of getting carbon we are only continuing the great tradition of man's stewardship of the planet.

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