V.Readtheparagraphanddecideonthebestchoice.Californiahasbeenfacingadroughtformanyyearsnow,withcertainareasevenhavingtopumpfreshwaterhundredsofmilestotheirdistributionsystem.Theproblemisgrowingasthepopulationofthestatecontinuestoexpand.Newresearchhasfounddeepwaterreservesunderthestatewhichcouldhelpsolvetheirdroughtcrisis.Previousdrillingofwellscouldonlyreachdepthsof1,000feet,butduetonewpumpingpractices,waterdeeperthanthiscanbeextracted(抽取).TheteamatStanfordinvestigatedtheaquifers(地下蓄水层)belowthisdepthandfoundthatreservesmaybetriplewhatwaspreviouslythought.HowcouldCalifornia’sdroughtcrisisbesolvedaccordingtosomeresearchers?
