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WATER PRESENT AND FUTURE
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abundance agricultural Alaska aluminum amount areas atoms basins beds California carbon caused chemical chromium clay coal cobalt Colorado concentrations construction copper damage deposits disposal drilling earth earthquake Engineering environment environmental erosion eruptions estimated fault feet flow fluoride fossil fuels ground water growth hazard heat hydrogen igneous rocks increase industry Lake land limestone lithosphere located magma manganese material metals metamorphic rocks miles million mineral resources mining molybdenum movement National natural gas nuclear nutrients occur ocean oil shale percent permafrost petroleum Photograph courtesy pipeline plants plate tectonics Pleistocene population present problem production radioactive reactors Reprinted by permission reserves reservoir River Rossi-Forel Scale salt sand sediment sedimentary sedimentary rocks seismic soil solar energy streams structures surface Table temperature tons trace elements tsunamis U. S. Geological Survey United uranium Vanadium volcanoes waste waves weathering wind zinc zone