关于粮食的英语作文：粮食危机

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halfoftheworld'spopulationcouldfacefoodshortagesbytheendofthiscenturyduetoclimatechange,anewstudywarnedthursday.

aordingtoresearchers,thereisa90percentprobabilitythatby2100theminimumtemperaturesinthetropicsandsub-tropicalregionswillbehigherthanthemaximumssofarrecordedinthoseareas.

theeffectoncrop-growinginthoseregionswouldbedire,aordingtotheprojectionsbasedondirectobservationsanddataculledfrom23putermodelsonthepla'sevolvingclimatepatterns.

"thestressesonglobalfoodproductionfromtemperaturealonearegoingtobehuge,andthatdoesn'ttakeintoaountwatersuppliesstressedbythehighertemperatures,"saiddavidbattisti,auniversityofwashingtonatmosphericsciencesprofessor.

inthetropics,thewarmesttemperatureswillcutmaizeandriceharvestsby20to40percent,theresearcherssaid.

thehotterweatherwillalsoreducethemoistureinthesoil,cuttingyieldsevenfurther.

somethreebillionpeople,orhalftheworld'spopulation,currentlyliveintropicalandsub-tropicalregions,andtheirnumberissettodoublebytheendofthecentury.

theseregionsstretchfromnorthernindia,southernchinatomuchofaustraliaandallofafrica,andalsoextendfromthesouthernunitedstatestonorthernargentinaandsouthernbrazil.