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1、increasericeharvestswithoutexpandingtheareaofthefields.In1950,Chinesefarmerscouldproduceonlyfiftymilliontonsofrice.Inarecentharvest,however,nearlytwohundredmilliontonsofricewasproduced.Theseincreasedharvestsmeanthat22%ofthwartworld’speoplearefedfromjust7%ofthefarmlandinChina.DrYuan
2、isnowcirculatinghisknowledgeinIndia,Vietnamandmanyotherlessdevelopedcountriestoincreasetheirriceharvests.Thankstohisresearch,farmersareproducingharveststwiceaslargeasbefore. DrYuanisquitesatisfiedwithhislife.However,hedoesn'tcareaboutbeingfamous.Hefeelsitgiveshimlessfreedomtodohisr
3、esearch.Hewouldratherkeeptimeforhishobbies.Heenjoyslisteningtovolinmusic,playingmah-jong,swimmingandreading.Spendingmoneyonhimselforleadingacomfortablelifealsomeansverylittletohim.Indeed,hebelievesthatapersonwithtomuchmoneyhasmoreratherthanfewertroubls.HethereforegivesmillionsofYua
4、ntoequipothersfortheirresearchinagriculture. Justdreamingforthings,however,costsnothing.LongagoDrYuanhadadreamaboutriceplantsastallassorghum.Eachearofricewasasbigasanearofcornandeachgrainofricewasashugeasapeanut.DrYuanawokefromhisdreamwiththehopeofproducingakindofricethatcouldfeedm
5、orepeople.Now,manyyearslater,DrYuanhasanotherdream:toexporthisricesothatitcanbegrownaroundtheglboe.Onedreamisnotalwaysenough,especiallyforapersonwholovesandcaresforhispeople. Chemicalororganicfarming? Overthepasthalfcentury,usingchemicalfertilizershasvecomeverycommoninfarming.Many
6、farmerswelcomedthemasgreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth. Whataresomeoftheproblemscausedbychemicalfertilizers?First,theydamagetheland
7、bykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalonogtime.Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime
8、.Manyofthesechemicalscanle