Itisprofitabletodrilltodepthsmorethan1,000feetforoilandgasextraction,butonlyrecentlyinCaliforniahasitbecomeprofitabletopumpwaterfromthisdepth.Theaquifersrangefrom1,000to3,000feetbelowtheground,whichmeansthatpumping,willbeexpensiveandthereareotherconcerns.Whatcanbeinferredaboutextractingwaterfromdeepaquifers?