全球变暖——英语演讲1PPT.ppt

《全球变暖——英语演讲1PPT.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、globalwarmingGlobalwarmingcausedbyCO2emissionsisoneofthemosturgentissuesfacinghumanityandourplanet.CO2emissionsreached8.5billiontonsin2008,with75%beingcausebythecombustionoffossilfuels.2010wasthehottestyearonrecord,with19countriesbreakingalltimeheatrecords.Julyof2011s

2、aweverystateintheUSbreakalltimetemperaturerecords.Wearethecauseofthisgreatwarming;TheCauseObesityEpidemic:Obesityrateshavetripledinthelast25years.With50%ofallautomobiletraveloccurringfortripsthatarethreemilesorless,theopportunitytosupplementdrivingwithmoreexerciseinte

3、nsiveformsoftransportationsuchascyclingandwalkingareallaroundus.Suchlifestylechangesalsohavesignificantenvironmentalandeconomicadvantages.EconomicImprovement:Lastyear,obesityrelatedhealthcomplicationsintheUScost$147billiondollars.Theamountspentonforeignoilwas$344billi

4、ondollars.Withschoolsspendingmoreonutilitiesthantextbooksandcomputers,thetimetoimproveoureconomicsustainabilityisnow.TheeffectofeachtempeatureriseTemperaturerisestosixdegreesfromonce123456Thetemperaturerise1℃AfteronedegreeCelsius(摄氏度['selsiəs])riseintemperature，halfo

5、ftheyearintheArctic(北极)willbeice-freestate，SouthAtlantic（大西洋的）coastal（沿海地区）areas,willsufferhurricane（飓风），residents（居民）inthewesternUnitedStateswillalsofaceseriouslong-termdroughtsThetemperaturerise2℃AftertwodegreesCelsiusriseintemperature，graduallymeltingice（融冰）,coralr

6、eefs（珊瑚礁）havegraduallydisappeared,andtheglobalsealevelrisesevenmeters.Thetemperaturerise3℃AfterthreedegreesCelsiusriseintemperature,Europewillcontinuetosufferinthehotweather,tensofmillionsorbillionsofrefugeesfromsub-tropical（亚热带）tomovetomid-latitudes（中纬度）.Thetemperatu

7、rerise4℃AfterfourdegreesCelsiusriseintemperature,sea-levelriseandflood(淹没)coastalcities;glaciersdisappear,causingseriouswatershortagesinmanyareas;And,Londonsummertemperaturesashighas45degreesCelsius.Thetempeaturerise5℃AfterfivedegreesCelsiusriseintemperature，theareasn

8、otsuitableforlivingareexpanding，thesupply（供给）ofwaterinsomebigcitiesofsnowandaquifersdryupphenomenon,millionsofpeoplebecomecl