你所问的是:什么是温室效应?
答: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 atmospheric warming.Carbon dioxide in the atmosphere like a thick layer of glass,so that the Earth has become a big greenhouses.It is estimated that if there is no atmosphere,the average surface temperature will drop to - 23 ℃,and the actual average surface temperature of 15 ℃,this means that the greenhouse effect so that the surface temperature increase 38 ℃.
In addition to carbon dioxide,the greenhouse gases that have an important role in the methane,ozone,chlorofluorocarbons,such as gas and water.With the rapid increase in population,the rapid industrial development,into the atmosphere of carbon dioxide in the corresponding increased also due to a large number of forest were felled,the atmosphere should be forest absorption of carbon dioxide have not been absorbed,as a gradual increase of carbon dioxide,the greenhouse effect has been enhanced .According to analysis,in the past 200 years,carbon dioxide concentrations increased 25 percent,the Earth average temperature increased by 0.5 ℃.It is estimated that middle of the next century,the Earth's surface temperature will rise an average of 1.5 - 4.5 ℃,and in the high latitudes of temperature rise more.
The consequences of the greenhouse effect is very serious.First of all the natural ecology will result in major changes.Desertification will be expanded,increasing land erosion,forest retreat to the polar regions,severe droughts and floods,the rainfall will increase by 7-11 percent more temperate winter wet,dry summer,more; will also become more tropical wet,dry heat of the sub-tropics have become more Drought,forcing the original re-adjustment of water conservancy projects.Coastal will no longer be under serious threat.As temperatures rise,the bipolar ice will melt,sea level rise more than 1 meter.Scientists believe otherwise,because of warming,caused sea water volume expansion,the sea level may rise 0.2 - 0.4 meters.Now a third of the world's population living in coastal areas,coastal areas is also very well-developed industrial and agricultural areas,will increase the sea flooded many cities and ports.
Global warming has caused the concern of people around the world.November 1988,the United Nations General Assembly has made a resolution,pointing out that carbon dioxide and other gases in the atmosphere continued to increase,may cause global warming and sea level rise,thus bring disasters to mankind,and called on the international community "to protect present and future generations of mankind Climate "and efforts.Therefore,we in the development of industrial production,it is necessary to actively control air pollution,the study of carbon dioxide converted into other substances,to prevent methane,chlorofluorocarbons and other gases spills.Second,we must protect the existing forests,to afforestation,the carbon dioxide in the atmosphere through photosynthesis in plants into nutrients.Finally,we should also use various means to reduce the overall consumption of fossil energy,as far as possible use of nuclear energy,solar,hydro,wind,to reduce carbon dioxide emissions.
