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populationexpansionisoneofthemostseriousproblemsintheworld.withbetterhygienionditionsandbettermedicalcare,fewerbabiesdietoday.butthebirthrateremainsunchanged.moreover,thedeathratehasbeenloweredconsiderablybyvariouskindsofprogress.peoplegenerallylivelongerthantheyusedto.allthesecontributetoaseriesofproblem:shortageofnationalresourcesandfoodsupplycrowdedcitiesandhighrateofunemployment.
tosolvealltheseproblems,wemusttakemeasurestocontrolbirthrate.thefirstimportantstepistoeducatepeople-tohelpthemunderstandtheadvantagesofsmallfamilies.anotherimportantmeasureistoraisepeople'slivingstandards.whenpeoplefullunderstandtheconsequencesofpopulationexpansion,andwhentheirstandardoflivingisraised,thebirthratewilldeclinewithoutpulsion.
thoughitisadifficulttask,weshouldtryinathousandandonewaystocarryoutbirthcontrolifwefailtodoso,theworldwillbetoocrowdedtolivein,andthenaturalresourceswillbeusedup.thenwewillnolongersurviveonearth.