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1、精品好文档，推荐学习交流Peoplearoundtheworldmayfeelthattheclimatehasbeengettingsteadilywarmerandwarmerinrecentyears.Placeswhichusedtobeabundantinsnowfallhavefrequentlyexperiencedno-snowwinters.Droughtlastslongerinsomedryareas.Peoplefindthatwithoutairconditionerstheycouldhardlyworko
2、rfallasleeponhottersummerdays.Thesideeffectsofglobalwarmingarealarming.Awarmerglobalclimatemeltstheicecaps,raisingsealevels.Whatismore,itdisturbsweatherpatterns,causingdroughts,severestorms,hurricanes(飓风).Peoplesufferalotfromdisastersrelevanttoglobalwarming.Howevergloba
3、lwarmingismainlyduetohumanactivities,suchasgreenhousegasesgeneratedbyindustrialproductionofnitrogenoxidesandcarbondioxide.Iftheatmosphereintheabsenceofsuchgases,theEarthwillbecometoocoldandnotsuitableforbiologicalsurvival.Intheatmosphereofgreenhousegaseshaveacertainthin
4、gisonlynaturalthatsomepeoplebelievethatthereisevidencethatevenintheabsenceofhumanimpact,wewillenteranothericeage.Butourconcernisthefaceoftheearth'sgreenhousegasesincreasingsoquicklyhasbeenathreattolifeonEarth.Humanactivitieshaveledtoglobalwarming,suchasdeforestation,whi
5、chmeansthatareductionofcarbondioxideintooxygen,andtheburningoffossilfuelsleadtosea-levelrise,Antarcticmeltingsnowandicetemperature.Meansea-levelrisecanbeusedtoreducethelandarea,meltingtheicemeansthatthereleaseofanyhazardoussubstancesmayalsocausefurthersea-levelrise.Thei
6、ncreaseintemperatureofbacteriaand仅供学习与交流，如有侵权请联系网站删除谢谢6精品好文档，推荐学习交流viruseswillalsoprovideafavorablegrowthconditions,whichwouldleadtomorediseases.Furthermore,whereverwegotoday,wecanfindrubbishcarelesslydisposed.Pollutionis,infact,threateningourexistence.然而全球气候越来越暖的最主要原因就
7、是人类的日常活动，人们在生产的过程中产生大量气体如二氧化碳和氮气等气体。如果大气中缺乏这种气体，地球会变得太冷从而破坏生物的生存。在大气中有一定的温室气体是很自然的事情，有一些人认为，证据表明即使没有人类的影响我们也将进入另一个冰河时代。但令人关注的是地球上的温室气体增加如此之快，已经严重威胁到了地球上的生物。人类活动导致全球变暖的问题,如森林砍伐,这意味着减少二氧化碳转化为氧气,燃烧化石燃料导致海平面上升,南极大陆的融化的雪和冰的温度。意味着海平面上升可以用来减少将冰融化的土地面积,意味着释放任何有害物质,也可能导致进一步的海平面上
8、升。温度升高的细菌和病毒还将提供一个良好的发育条件,从而导致更多的疾病。另外，无论我们走到哪里，到处可见随意丢弃的垃圾。事实上，污染正威胁我们的生存。Nowinsomeplacesofourcountry，anumber
