人们总以为淡水是取之不尽的，实际上淡水资源是很有限的。请谈谈你的看法。

Itisgenerallybelievedthatthereisagoodsupplyoffreshwater.Buttoourdisappointment,thefactisjusttheopposite.

Aswecansee,theworldpopulationisgrowingrapidlydaybyday.Soenoughfreshwaterisneededtofeedsuchabigpopulation.Whatsmore,withthedevelopmentofindustry,factoriesandvehiclesproducepoisonousgasesorwastes,whichconsequentlyresultsinthepollutionofwater.Thoughfresh,agoodamountofitcannolongerbeused.Onlyquitelimitedfreshwaterresourceisavailabletohumanbeings.Soitshightimeforushumanbeingstotakequickactiontoprotectwaterresource.Stoppollutionandsavewater,otherwise,wecannotsurviveontheearth.

Withfreshwater,theworldwillbeprosperous.(130words)