Noonecanhavefailedtonoticethefactthatwatershortageisagraveproblemwithwhichthewholeworldisconfronted。Actually，ithasbecomesowidespreadthatithasseverelyaffectedpeople’sdailylifeandhinderedthedevelopmentoftheglobaleconomy。
Anumberoffactorscouldaccountfortheproblem，butthefollowingmightbethecriticalones。First，withthedevelopmentofagricultureandindustry，anincreasingamountofwaterisneeded。Secondly，theever-increasingpopulationisanotherleadingcauseofwatershortage。
Besides，theglobaltendencyofwarmingupalsocontributestotheproblem。What’sworse，pollutionandwasteoffreshwateraggravatethesituation。
Inviewoftheseriousnessoftheproblem，effectivemeasuresmustbetakenbeforethingsgetworse。First，itisessentialthatlawsandregulationsbeworkedoutandenforcedtoprotectwaterresources。Secondly，peopleshouldenhancetheirawarenessofsavingwater。
Withthesemeasurestaken，itisreasonableforustoexpectabrighterfuture。
