更新时间：2025-08-07 14:28:50
halfoftheworld'spopulationcouldfacefoodshortagesbytheendofthiscenturyduetoclimatechange,anewstudywarnedthursday.
accordingtoresearchers,thereisa90percentprobabilitythatby2100theminimumtemperaturesinthetropicsandsub-tropicalregionswillbehigherthanthemaximumssofarrecordedinthoseareas.
theeffectoncrop-growinginthoseregionswouldbedire,accordingtotheprojectionsbasedondirectobservationsanddataculledfrom23computermodelsontheplanet'sevolvingclimatepatterns.
"thestressesonglobalfoodproductionfromtemperaturealonearegoingtobehuge,andthatdoesn'ttakeintoaccountwatersuppliesstressedbythehighertemperatures,"saiddavidbattisti,auniversityofwashingtonatmosphericsciencesprofessor.
inthetropics,thewarmesttemperatureswillcutmaizeandriceharvestsby20to40percent,theresearcherssaid.
thehotterweatherwillalsoreducethemoistureinthesoil,cuttingyieldsevenfurther.
somethreebillionpeople,orhalftheworld'spopulation,currentlyliveintropicalandsub-tropicalregions,andtheirnumberissettodoublebytheendofthecentury.
theseregionsstretchfromnorthernindia,southernchinatomuchofaustraliaandallofafrica,andalsoextendfromthesouthernunitedstatestonorthernargentinaandsouthernbrazil.
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