Population的优秀作文

Thehumanracehasexperiencedaconsistentincreaseinpopulationsincethebeginningofitshistory.Famineanddiseasehavedonelittletooffsetthissteadyincrease.Toomanypeopleareaddedannuallytothepopulationoftheworld.S......

Thisisreallyaseriousproblemweshouldpayattentionto!Sothistopicisquitemeanfulling!sonetcollectedthisessayforyou!Thehumanracehasexperiencedaconsistentincreaseinpopulationsincethebeginningofitshistory.Fam......

Asisseenfromthetwographs,itisclearthatwiththerapidgrowthofU.S.populationfrom1800to1990,thenumberofitswildlifespeciesnolongerexistingsoaredduringthesameperiod.Naturally,wecandrawtheconclusionthatthesha......

nothingintoday'sworldisasbigaproblemasthatofpopulation.peoplebegintoworryaboutthesupportcapacityoftheearth.andtheremightbeonlystandingroomforeachpersoninthefuture.lima'spopulationwas5.7million......

Now,thepopulationquestionalreadytheworldwidebasisquestion,wemustpayattention.in2000theworldpopulationachieved6,000,000,000,becausethepopulationquestionhasbeenintheworldthemostmajorproblemoverpopulatio......

Environmentalproblemsarebecomingmoreandmoreseriousallovertheworld.Forexample,carshavemadetheairunhealthyforpeopletobreatheandpoisonousgasisgivenoffbyfactories.Treesonthehillshavebeencutdownandwastewat......

Manycountrieswillexperienceagingpopulationsinthenextcenturybecauseofdecliningbirthandmortalityrates.Chinawillsoonjointheirranks.Asfortheissueofaging,itssituationhasbeengrowingincreasinglysevereinspite......

Ithasbeenestimatedthatathousandyearsagotherewerelessthan400millionpeopleonearth.Today,however,theworld＇spopulationhasamountedto5,000million.Whatisworse,itkeepsgrowingatasurprisingspeed.Ifthistrendconti......

Currently,thereisawidespreadconcernaboutthepreviouslyneglectedconnectionbetweengrowinghumanpopulationanddecreasingwildspecies.Asthetwographsobviouslyportrayed,Americanpopulationin1980was250timesthanth......

Populationexpansionisoneofthemostseriousproblemsintheworld.Withbetterhygienicconditionsandbettermedicalcare,fewerbabiesdietoday.Butthebirthrateremainsunchanged.Moreover,thedeathratehasbeenloweredconsi......

Manycountrieswillexperienceagingpopulationsinthenextcenturybecauseofdecliningbirthandmortalityrates.Chinawillsoonjointheirranks.Accordingtostatistics,theagingofChina'spopulationwillapproachitspeak......