英语科普小知识长期接触木柴烟与烟草烟雾易患肺炎

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1、海量资料下载免费学习英语www.englishvip.com/xinlw.htm（申请网址）Peoplewhoareconsistentlyexposedtobothwoodsmokeandtobaccosmokeareatagreaterriskfordevelopingchronicobstructivepulmonarydisease(COPD慢性阻塞性肺炎)andforexperiencingmorefrequentandseveresymptomsofthedisease,aswellasmoresevereairflowobstruction,thanthosewhoa

2、reexposedtoonlyonetypeofsmoke,accordingtotheresultsofanewpopulation-basedstudyconductedbyresearchersinColombia.TheresultsofthestudywillbepresentedattheATS2013InternationalConference. Concernscontinuetogrowabouttheeffectsofclimatechangeonfire.Wildfiresareexpectedtoincrease50percentacrosstheUnit

3、edStatesunderachangingclimate,over100percentinareasoftheWestby2050asprojectedbysomestudies.Ofequalconcerntoscientistsandpolicymakersalikearetheatmosphericeffectsofwildfireemissionsonclimate.AnewarticlepublishedinthejournalForestEcologyandManagementbyU.S.ForestServicescientistssynthesizesrecent

4、findingsontheinteractionsbetweenfireandclimateandoutlinesfutureresearchneeds.AuthoredbyresearchmeteorologistsYongqiangLiuandScottGoodrickfromtheForestServiceSouthernResearchStation(SRS)andWarrenHeilmanfromtheNorthernResearchStation,thearticlehomesinontheeffectofemissionsfromwildfiresonlong-ter

5、matmosphericconditions. "Whileresearchhashistoricallyfocusedonfire-weatherinteractions,thereisincreasingattentionpaidtofire-climateinteractions,"saysLiu,leadauthorandteamleaderwiththeSRSCenterforForestDisturbanceScience."Weather,theday-to-daystateoftheatmosphereinaregion,influencesindividualfi

6、reswithinafireseason.Incontrast,whenwetalkaboutfireclimate,we'relookingatthestatisticsofweatheroveracertainperiod.Fireclimatesetsatmosphericconditionsforfireactivityinlongertimeframesandlargergeographicscales." Wildfiresimpactatmosphericconditionsthroughemissionsofgases,particles,water,andheat

7、.Someofthearticlefocusesonradiativeforcingfromfireemissions.Radiativeforcingreferstothechangeinnet(downminusup)irradiance(solarpluslongwave)atthetropopause,thetopofthetropospherewheremostweathertakesplace. Smokeparticlescangenerateradia