ThespreadofWesterneatinghabitsaroundthewoodisbadforhumanhealthandtheenvironment．ThesefindingscomefromanewreportinthejournalNature．Therearewaystosolvethisdiet-health-environmentproblem.Buttheywillrequirea

　　ThespreadofWesterneatinghabitsaroundthewoodisbadforhumanhealthandtheenvironment．ThesefindingscomefromanewreportinthejournalNature．Therearewaystosolvethisdiet-health-environmentproblem.Buttheywillrequireachangeineatinghabits.Andwhatweeatcanbeaproductofculturepersonaltastepriceandease.

　　DavidTillmanaprofessorofecologyattheUniversityofMinnesotaAmericaexaminedinformationfrom100countriestoidentifywhatpeopleateandhowdietaffectedhealth．Henotedamovementbeginninginthe1960s．HefoundthatasnationsindustrializedpopulationincreasedandearningsrosemorepeoplebegantoadoptwhathasbeencalledtheWesterndiet．

　　TheWesterndietishighinsugarfatoilandmeat．Byeatingthesefoodspeoplebegantogetfatterandsicker．DavidTillmansaysoverweightpeopleareatgreaterriskfornon-infectiousdiseaseslikediabetesandheartdisease．

　　UnfortunatelywhenpeoplebecomeindustrializediftheyadoptthisWesterndiettheyaregoingtohavethesehealthproblemsespeciallyindevelopingcountriesinAsia．Chinaisanexamplewherethenumberofdiabetescaseshasbeenjumpingfromlessthanonepercentt010percentofthepopulationastheybegantoindustrializeovera20-yearperiod．AndthatishappeningallacrosstheworldinMexicoinNigeriaandsoon．

　　Andadietbadforhumanbeingsitseemsisalsobadfortheenvironment．Astheworld'spopulationgrowsmoreforestsandtropicalareaswillbecomefarmlandforcropsorgrasslandsforgrazingcattle．Theseareaswillbeneededtomeettheincreasingdemandforfood.Moregreenhousegasarelikelytobereleasedinthefuturefromagriculturebecauseofthisdietaryshiftthanallthegreenhousegasthatrightnowcomesoutofallthecarsandalloftheplanesboatsandshipsallformsoftransportation．Sothechangeindietislikelytobeworsefortheworldforclimatewarmingthanallthetransportationsources.

　　Mr.Tillmancallsthelinkbetweendiettheenvironmentandhumanhealth"atrilemma."Thisaplayontheword"adilemma":aproblemofferingadifficultchoice．HesaysonepossiblesolutionisleavingtheWesterndietbehind．

　　28.Whatcanwelearnfromthefirstparagraph?

　　A.Thewesternsshouldchan