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- 素材大。
- 2.64 MB
- 素材授權(quán):
- 免費(fèi)下載
- 素材格式:
- .ppt
- 素材上傳:
- lipeier
- 上傳時(shí)間:
- 2019-10-25
- 素材編號(hào):
- 244232
- 素材類別:
- 課件PPT
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素材預(yù)覽
這是全球氣候變暖的英文ppt,包括了What is Global Warming?The cause of global warming,The green house effect,Industrial waste gases,Deforestition,Melting glaciers等內(nèi)容,歡迎點(diǎn)擊下載。
全球氣候變暖的英文ppt是由紅軟PPT免費(fèi)下載網(wǎng)推薦的一款課件PPT類型的PowerPoint.
What is Global Warming? Global warming is the observed century-scale rise in the average temperature of Earth's climate system. 全球變暖是指全球氣溫在近一百年來不斷上升,呈現(xiàn)變暖的趨勢(shì),這樣一種氣候變化特征。 The cause of global warming 1.Natural cause: The green house effect 2.Human reasons: Human activities The green house effect The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases. 溫室效應(yīng)是一個(gè)過程,從行星表面熱輻射被大氣吸收溫室氣體,并再次輻射向四面八方。因?yàn)檫@部分再輻射回到地表和低層大氣,它導(dǎo)致海拔平均表面溫度高于沒有這部分氣體。 Human activities 1.Industrial waste gases 2.Deforestation 3.Traffic jam Industrial waste gases Deforestition Traffic jam What're the effects of global warming Negative effects 1.Cause the sea level to rise 2.Melting glaciers 3.Droughts 4.Disappearance of species Droughts If the earth's average temperature 4 degrees Celsius, the world will have more than 30 million people water shortages. 如果地球平均氣溫上升4攝氏度,全球就會(huì)有30多億人面臨缺水問題。 Melting glaciers the earth‘s poles island fate snow melt can lead to rising sea levels, many islands will be drowned, some island may not exist. 地球兩極冰雪融化會(huì)導(dǎo)致海平面上升,眾多島嶼將被淹沒,一些島國(guó)可能不復(fù)存在。 So,let us do our best to solve this problem,or we will bear this problem in the future
全球氣候變暖ppt:這是全球氣候變暖ppt,包括了全球變暖是真的嗎?(診斷),為什么會(huì)這樣?(病因),有何危害?(并發(fā)癥和后遺癥),如何應(yīng)對(duì)?(治療方法)等內(nèi)容,歡迎點(diǎn)擊下載。
全球氣候變暖的危害PPT:這是一個(gè)關(guān)于全球氣候變暖的危害PPT,這節(jié)課主要是了解全球氣候變暖的原因分析,全球變暖導(dǎo)致非洲最高山峰冰雪融化,影響農(nóng)業(yè)生產(chǎn),全球變暖 利弊分析,(變暖)應(yīng)對(duì)措施。氣候變化的適應(yīng)對(duì)策等等介紹。全球氣候變暖是一種和自然有關(guān)的現(xiàn)象。由于人們焚燒化石燃料,如石油,煤炭等,或砍伐森林并將其焚燒時(shí)會(huì)產(chǎn)生大量的二氧化碳,即溫室氣體,這些溫室氣體對(duì)來自太陽輻射的可見光具有高度透過性,而對(duì)地球發(fā)射出來的長(zhǎng)波輻射具有高度吸收性,能強(qiáng)烈吸收地面輻射中的紅外線,導(dǎo)致地球溫度上升,即溫室效應(yīng)。而當(dāng)溫室效應(yīng)不斷積累,導(dǎo)致地氣系統(tǒng)吸收與發(fā)射的能量不平衡,能量不斷在地氣系統(tǒng)累積,從而導(dǎo)致溫度上升,造成全球氣候變暖這一現(xiàn)象。全球變暖會(huì)使全球降水量重新分配、冰川和凍土消融、海平面上升等,不僅危害自然生態(tài)系統(tǒng)的平衡,還威脅人類的生存,歡迎點(diǎn)擊下載全球氣候變暖的危害PPT哦。