,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2014/4/16,#,Our globe is in,danger,!,The greenhouse effect,What is,greenhouse effect?,The so-called,greenhouse effect,is short-wave solar radiation through the atmosphere into the ground,and warming the ground after the length of radiation being released in the atmosphere by absorbing carbon dioxide and other substances,thereby creating the effect of atmosphere warming.,definition,Greenhouse gas,Carbon dioxide is not the only,Greenhouse,gas.,Other gases,such as methane(CH4)and nitrous(,氮的,or,硝的,)oxide(NO),are even strong infrared(,红外线的,)absorbers.,Greenhouse gas,Greenhouse,gas emissions,What,problem,does Greenhouse effect cause?,Abnormal weather patterns,Negative impact on agricultural production,More plant diseases and insect pests(,病虫害,),More desertification,Rises in sea level,Flood,phenomena,phenomena,The effects of,Global warming,can have many unforeseen side effects,such as the melting of some of the earths ice stored in its poles and its glaciers.,Global warming-worries,A worldwide greenhouse effect might produce a dangerously warmer world.,Since the later 19,th,century,the average global temperature has,increased,between,0.3,and 0.6.Internationally,2010 was the hottest year on record since official weather records first started being kept by the British in about 1860.,Global warming-worries,Estimates of global averages,Global warming,worries,drought,Estimates of global averages temperatures have projected,an increase of as much as 5,before the year 2100.such a rise in global temperature would produce new patterns and extreme drought and rainfall,which would seriously disrupt food production.This could potentially cripple the North America corn belt,leading to much higher food prices,and even less food for the Third World than they already have.,Global warming,worries,rising sea levels,The other serious worry is that rising sea levels from the melting of polar ice could severely flood many countries.A rise in sea levels of one meter,which many experts are predicting by the year 2100(and some as soon as 2030),would flood 15 percent of Egypt,and 12 percent of Bangladesh(,孟加拉国,).The Maldives(,马尔代夫,)in the Indian Ocean would almost completely disappear.,What should we,do,?,Take the public transportation,Don,t set off the firecrackers(,爆竹,),Use solar,Afforestation(,造林,),Burn less fuel,Protect plants,Consume less wood,Understand relevant knowledge,Be volunteers,Support environmental protection commonwealth(,全体公民,),Live simple!,What should we do?,As long as we try,we will,succeed!,Thank you!,