北师大版高中英语选修八Unit 22《Environmental Protection》ppt课件
考点
日前,一幅北极冰盖融化时的照片发人深省,因为它看起来仿佛一 张“哭泣的人脸”,专家形容这就像是绝望的“大自然母亲”在对全球变暖 的世界环境进行无声的抗议。
Arctic ice reveals last decade was the hottest in 2,000 years. The Arctic is now warmer than at any time during the last 2,000 years,according to a major new study. Temperatures around the North Pole have dramatically increased in the last 50 years—reversing a long-term natural cooling trend,scientists say.
The decade between 1999 to 2008 was the warmest in the last 2,000 years,the research found. Previous research has shown that Arctic temperatures rose three times faster during the 20th century than the rest of the Northern Hemisphere. Some experts have predicted that the Arctic could be free from sea ice in the winter within the next few decades if the temperatures continue to rise.
The wobble slowly increased the distance between the Earth and the Sun during the Arctic summer,reducing summer temperatures by around 0.2℃ every thousand years and causing the “Little Ice Age” that led to freezing winters in the 17th,18th and 19th centuries. But during the 20th century,temperatures began to rise dramatically—even though the amount of sunlight reaching the Arctic during the summer was continuing to fall.
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The study,based on an analysis of ice cores,lake sediments(沉淀物) and tree rings,provides compelling evidence that greenhouse gases released since the start of the industrial revolution are triggering(引起)global warming,the researchers say. Lead author Darrell Kaufman of Northern Arizona University said,“Scientists have known for a while that the current period of warming was preceded by a long-term cooling trend.But our reconstruction quantifies the cooling with greater certainty than before.”
Unit 22
Environmental
Protection
功能
Justifying arguments Giving opinions
1.In the last few decades,scientists have reached consensus and reported that... 2.Looking ahead,scientists believe that... 3.Given this data,it seems that the link between 句型 human activities and rising global temperatures is not merely a coincidence. 4.But why wait around for governments to take action? 5.They suggest making small changes... 6.Storms have been getting worse everywhere too,with a growing number of hurricanes hitting the US...
The research—published in the journal Science—comes from a team of British and American geologists who tracked summer Arctic temperatures to the time of the Romans by studying natural signals in the landscape. Their reconstruction found that the Arctic got cooler in the summer months between 1 AD and 1900,thanks to a natural “wobble”(摇摆) in the Earth’s orbit around the Sun.
语法 写作
Reporting The Passive(Ⅲ) A report 动词短语 (2012 陕西 ,19) 虚拟语气 (2012 福 建 ,31) 非 谓 语 动 词 (2012 北 京 ,27;2012 天 津 ,11;2012 大纲全国Ⅱ,10;2012 陕西 ,15;2012 福 建,28;2012 辽宁,25;2012 湖南,23) 被动语态(2012 北 京 ,29;2012 重 庆 ,27;2012 湖 南 ,22;2012 安 徽,35;2012 天津,2;2012 四川,11)
北师大版高中英语选修八 Unit22 environmental protect-词汇篇1(学生版)
北师大版高中英语选修八Unit22 environmental protect-词汇篇1（学生版）Unit 22 Environmental Protection词汇篇1____________________________________________ __________________________________________________________________________________ ______________________________________1、掌握第一单元第一课及第二课的重点单词，短语及句型。
2、灵活运用第一单元第一课及第二课的重点单词，短语及句型。
1.trap vt. 使困住；使陷入困境；诱骗；n. 陷阱The little dog is trapped in the cage. How pitiful it is! 这只小狗被困在笼子里了，它好可怜啊。
归纳拓展：①be trapped in 被困于②trap sb. into doing sth. 诱骗某人做某事③set/lay a trp 设置陷阱，布下圈套④fall/walk into a trap 落入陷阱，圈套2.a number of adj. 许多的；大量的归纳拓展：英语中表示许多的短语可分为三类：①修饰可数名词：a large/great number of , aLook ahead in the distance, and you can see the light of the village beyond.往远处看，你便可以看见那边村庄里的灯光。
归纳拓展：look about/around 环顾四周，随便看，到处看look back 回顾，回想look up to 尊敬，钦佩look forward to 期待，盼望look down on [upon] 看不起，瞧不起look into 调查，研究，了解look on 旁观look out 向外看，注意，当心3.relevant adj. 有关的; 切题的We students shouldn’t do what is not releva nt to our study.我们学生不应该做和学习无关的事情。
高中英语北师大版选修八《unit22environmentalprotection》课件
完成句子 ④His daughter is lovely beyond compare .他女儿真是可爱得无与伦比。 ⑤She convinced me that Paul was, beyond doubt , innocent. 她使我深信,保罗确实是清白无辜的。 ⑥ It's beyond me why he always behaves like that. 我无法理解他为什么总是那样做。 ⑦I am afraid it is beyond my power to do what you are asking.
单句改错 ④It is advisable to keep some food on reserve in case of emergency.
on→in
完成句子 ⑤He told me all about it 于这件事的全部。
without reservation .他毫无保留地告知我关
点拨 (1)reserve sth. for为……保留/预订某物 (2)a nature reserve自然保护区 in reserve备用,储备 (3)reservation n.保留意见;预订 make a reservation预订 without reservation 毫无保留地
words. 有时我们并不能用言语来表达我们的感情。
写作微练 ⑨他们通过努力工作已经为城市的繁华做出了巨大贡献。
They have made great contributions to the boom of the cities by means of working hard.
点拨 (1)means单复数同形,作主语且前有every,each,one等词时,谓语动词用单 数情势;前有several,many,few,all等词时,谓语动词用复数情势。 (2)the means of doing sth.做某事的方法 means of transport交通工具 (3)by means of依靠……方法 by all means当然行;可以 by any means用一切可能的方法
北师大版高中英语选修八Unit 22《Environmental Protection》word教案
安徽省滁州市第二中学高中英语 Unit22 EnvironmentalProtection教案北师大版选修8Ｉ．单元教学目标II．目标语言...found that ... is regulated...III．教材分析与教材重组1. 教材分析本单元以环保为话题，介绍了人类与环境、动物与环境的关系。
本单元通过读听说写系列活动使学生了解环境方面存在的问题及解决办法。
通过课堂上的系列教学活动，使学生了解地球变暖、温室效应、濒危动物、自然灾害、环境污染、噪音污染等问题，在当今时代，日益恶化的环境告诫人们：环境保护事业与全人类生存休戚相关。
本单元的教学旨在激发同学们的环保意识，号召人人为保护环境做出贡献，让人们永远生活在美好环境中。
1.1 In this unit you will ...介绍了本单元的学习目标，让学生了解本单元的话题和内容，明确了学习方向。
1.2 Warm–up 通过一系列的听说写活动，激发学生的兴趣，为本单元的学习奠定良好的基础。
内容涉及环境方面存在的问题及拯救濒危动物的建议。
1.3 Lesson 1 Global Warming介绍了什么是地球变暖以及地球变暖对人类的影响。
语法涉及Reporting和Passive Voice (III)。
在学习课文之前要求学生就发展中国家还是发达国家对地球变暖负有更多的责任加以讨论，这些问题旨在调动学生学习的主动性，引导学生学会思考问题。
在学习课文之前要求学生弄懂一些重点词的意思，减少阅读中的困难。
通过课文的学习，学生们可以了解什么是地球变暖以及地球变暖对人类的影响。
在此基础上引导学生对怎样减少温室效应进行讨论。
课文后附有词汇和语法练习题。
练习题的设计还是围绕环境问题进行的。
1.4 Lesson 2 Endangered Species通过一系列的听说练习让学生了解不同濒危动物，并且就保护濒危动物问题提出建议。
要求学生根据听力策略学会在听报告时记要点，学会表达自己的观点，能够使用恰当词汇辩论。
高二英语北师大版选修8Unit22EnvironmentalProtection单元测评含解析
英语北师版选修8Unit 22 Environmental Protection单元测评(满分：120分时间:120分钟）一、听力(共两节，满分20分）第一节(共5小题；每小题1分，满分5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置.听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
W：That was the last bus home！And we've missed it！Call a taxi!M：A taxi？I'm not a millionaire.1。
What does the man mean?A．They are not rich enough to call a taxi.B．The woman has mistaken him for a millionaire.C．He doesn't understand what the woman means。
W：I got a few things from the shop。
M：A few？It looks like you bought out the supermarket!2.What does the man mean？A．The woman looks like the owner of the supermarket。
B．The woman did too much shopping from the supermarket。
C．The woman seems to have bought her things outside the supermarket.M：After I’ve finished reading this book，I can lend it to you if you are interested。
新北师大版高中英语选修八unit 22《environmental protection》the second period优秀教案(重点资料).doc
安徽省滁州市第二中学高中英语Unit22 Environmental Protection The Second Period Lesson 1 Global Warming教案北师大版选修8Teaching goals 教学目标1. Target Language目标语言a. 重点词汇和短语consensus, beyond, relevant, refer, bounce, pin, coincidence, condemn, federal, reservation, sacrifice, advocate, recycle, substitute, beyond one’s control, take action, ahead ofb. 重点句子In the last few decades, scientists have reached consensus and reported that human beings are causing changes in the Earth’s c limate —something previously seen as beyond our control.2. Ability goals 能力目标Learn what global warming is and enable students to learn its causes and consequences.3. Learning ability goals学能目标By reading an article help students to learn how they can help solve the problem of global warming.Teaching important points教学重点What human activities are causing global warming and how we can help solve the problem of global warming.Teaching difficult points教学难点How we can help solve the problem of global warming.Teaching methods教学方法Listening, reading, discussing.Teaching aid 教具准备Multimedia computer.Teaching procedures & ways 过程与方式Step I Leading inIn this procedure students will talk about the causes and consequences of global warming. Begin the lesson by asking students to discuss the questions in before you startT: Yesterday we learned from the passage in Culture Corner that gases from burning coal and oil are the major causes of global warming. Did you make your survey on how students come to school?S1: I asked 40 students. Ten in the forty come to school by bus. Twenty-one ride bicycles. Eight of the forty take a car and only one walks to school....T: From the survey you made we can see most of students in our school take a green way to school. I’m glad we are not having so many cars. Because gases pumped into the atmosphere from cars will speed up global warming. Have you noticed that in 2006 we had a very warm winter? Experts say global warming has changed the climate in China. In this class we are going to learn more about global warming. We will read an article “Can we take the heat?”Before we start the text, please discuss the question in Before you start.Step II Before you startDiscuss the two questions in Before you start and work out the meanings of the given words. T: OK, open your books and discuss the question in Before you start on Page 6. Which countries do you think contribute more to global warming, developed countries or developing countries?Ss: Developed countries. Because they have more cars and factories and gases from cars and factories are the major cause of global warming.T: Good answer. Please scan the text for the given words in Ex2 and try to work out their meaning.While students are discussing the words, Teacher should walk around the classroom and give necessary help when needed.Several minutes later, ask students to present their answers either in English or Chinese. Students may even be encouraged to explain the meanings using pictures. Show the suggested answers on the PowerPoint.Step III Read to learnDeal with the reading part.ScanningAsk students to scan the text and find what exactly global warming is.T: What is the title of Lesson 1?Ss: Global Warming.T: Do you know what exactly global warming is? Please scan the text and find the answer in the text.Ss: Global warming refers to an average increase in the Earth’s temperature.T: Quite good! Then skim the text and find what human activities are causing global warming. S: As a result of increased industry, agriculture, the cutting down of forests, the increase in transport and the burning of fuels, nearly 6 tones of carbon dioxide goes into the atmosphere every year for every one of the Earth’s 6 billion people. Over the last 100 years, the global average temperature has increased by 1°F. If we continue to produce carbon dioxide and other gases in such quantities, we are condemning life on Earth and should expect severe consequences.SkimmingShow the following form on the PowerPoint and ask them to work in groups and complete the form.Ask students to skim the text and then finish Ex3 on Page 7. Students may discuss the questions in groups.T: Look through the questions in Ex 3 on Page 7 first. Then skim the text to find the answers. Then check the answers with the whole class.Suggested answers:1. Global warming is an average increase in the Earth’s temperature.2. Increased industry, agriculture, the cutting down of forests, the increase in transport and the burning of fuels are causing global warming.3. By 1°F.4. Yes, they are. Because greenhouse gases trap heat from the sun in the Earth’s atmosphere. Otherwise the earth would be very cold and unsuitable for life.5. We can take public transport, recycling, using low-flow shower heads, buying efficient light bulbs to stop global warming.Step IV ExplanationDuring this procedure teacher will play the tape for students. Students will underline the difficult sentences. After listening to the tape, Teacher will explain the text and deal with language problems.T: After doing the comprehension of the text, let’s deal with some difficult language focuses. Now I will play the tape for you .Please make a mark where you have difficulties.After listening to the tape, explain the difficult sentences to students. Before explaining the difficult points, students are asked to refer to the notes to the text on page 114.T: Do you have any difficulties with the text？S1: Could you please explain the second paragraph to us?T: The second paragraph tells us the association greenhouse gases have with global warming. The “greenhouse effect”often gets a bad rap because of its association with global warming, but the truth is we couldn’t live without it. Life on earth depends on energy from the sun. About 30 percent of the sunlight that beams toward Earth is deflected by the outer atmosphere and scattered back into space. The rest reaches the planet’s surface and is reflected upward again as a type of slow-moving energy called infrared radiation.As infrared radiation is carried aloft by air currents, it is absorbed by “greenhouse gases”such as water vapor, carbon dioxide, ozone and methane, which slows its escape from the atmosphere.Although greenhouse gases make up only about 1 percent of the Earth’s atmosphere, they regulate our climate by trapping heat and holding it in a kind of warm-air blanket that surrounds the planet. This phenomenon is what scientists call the "greenhouse effect." Without it, scientists estimate that the average temperature on Earth would be colder by approximately 30 degrees Celsius (54 degrees Fahrenheit), far too cold to sustain our current ecosystem.While the greenhouse effect is an essential environmental prerequisite for life on Earth, there really can be too much of a good thing.The problems begin when human activities distort and accelerate the natural process by creating more greenhouse gases in the atmosphere than are necessary to warm the planet to an ideal temperature.Today, the increase in the Earth’s temperature is increasing with unprecedented speed. To understand just how quickly global warming is accelerating, consider this:During the entire 20th century, the average global temperature increased by about 0.6 degrees Celsius (slightly more than 1 degree Fahrenheit).Using computer climate models, scientists estimate that by the year 2100 the average global temperature will increase by 1.4 degrees to 5.8 degrees Celsius (approximately 2.5 degrees to 10.5 degrees Fahrenheit).Now please read the first sentence in the second paragraph. What’s the function of that-clause? S1: It is an attributive clause modifying ‘an average increase’.T: Good! ‘that’refers to ‘an average increase in the Earth’s temperature’. From this sentence we can learn an average increase in the Earth’s temperature will cause climate changes. In the second sentence there is also an attributive clause caused by ‘which’. What does ‘which’refer to?S2: ‘Which’refers to greenhouse gases.T: Right! Greenhouse gases trap heat from the sun in the Earth’s atmosphere. Without greenhouse gases, the earth would be very cold and impossible for life. Do you have any other questions?S2: No.T: There are many useful phrases in the te xt. Please sum up the phrases and then we will analyze the text.Step V PracticeDeal with Ex 5 on page 7. Ask students to do the exercises individually. While doing the exercises, remind students that they should pay attention to the correct form of the given words. Make necessary changes where needed. Then check the answers with the whole class.Step VI Analyzing the textHelp students analyze the structure of the text. Ask students to discuss in groups and later each group will speak out their opinions. After this, show the suggested answers on the PowerPoint. T: OK. Let’s read the text again. Please look at the structure of the text. You are given 5 minutes.…T: Please stop here. I’m glad you thought actively and had a heated discussion. What is its writing style?Ss: This text is an expository writing.T: What is the topic of the text? What is the text about?S1: Global warming.S2: The text introduces what global warming is.S3: Its causes and consequences.S4: And how we can help solve the problem of global warming.T: Quite good. How many parts consist of the a rticle? What’s the main idea of each part?S4: In my opinion the article is made up of four parts. In the first paragraph the author raises the question. In the second paragraph we can find its definition. And the third and fourth paragraphs tell us its causes and consequences. And the last part the author gives us some tips on how to solve the problem.T: Well done!If students have different opinions, Teacher may help them analyze the text.Show the following on the PowerPoint.Part1 (the first paragraph) Global warming could be one of the biggestenvironmental problems facing the 21st century.Part2 (Para.2) W hat global warming is.Part3 (Para.3-4) Its causes and consequences.Part4 (Para.5) Tips on how to solve the problem.T: After learning the tips on how to solve the problem, let’s discuss what we will do every day to help reduce greenhouse gases. Please make your voice heard and get involved in the discussion. After the discussion, please write your suggestions on a piece of paper and put it on your bulletin board so that you can share your ideas with the whole class.Step VII DiscussionDivide the students into different groups and discuss the questions of Ex 4 on Page 7. They are given several minutes to discuss. Each member is encouraged to think actively and participate in the discussion. Make sure all the students have their own opinions. Every group should have their secretary to write down the discussion. Then each group should pin the suggestions on the bulletin board so that everyone can read them and learn about others’good way to reduce green house gases.T: Please work in groups and express yourself freely. Because everyone has his or her own practical way, please share your ideas with your group members.…T: Before starting your discussion, please read the following.Show the following on the PowerPoint.The Top Five Global Warming Polluters!1.The United States2.China3.Russia4.Japan5.America’s Cars and Light TrucksChina to Invest $175 Billion in Environmental Protection Over Five Years China has created an “economic miracle”over the past two decades, air pollution is choking its cities, chemical spills are fouling its rivers and drinking water supplies, soil contamination is undermining its agriculture, and raw sewage is causing widespread disease. This environmental toll has led to internal riots, international protests, and the arrest and trial of a leading Chinese environmentalist.In 2006, China pledged to invest $175 billion by 2010 to control water pollution, improve air quality, increase solid waste disposal and reduce soil erosion —investments intended to pay economic as well as environmental dividends.A sample of Ex 4 on page 7Responsible ChoicesThe choices we make and the products we buy test our commitment to maintain a healthy planet. When we burn fossil fuels such as oil, coal, and natural gas to run our cars and light our homes, we pump carbon dioxide (CO) into the air. This thickens the heat-trapping blanket that2surrounds the planet, causing global warming.Choosing modern technology can reduce our use of fossil fuels and help protect the planet. These steps will help curb global warming, save you money, and create a safer environment for the future.Drive Smart!A well-tuned car with properly inflated tires burns less gasoline cutting pollution and saving you money at the pump. If you have two cars, drive the one with better gas mileage whenever possible. Better yet, skip the drive and take public transit, walk, or bicycle when you can.Replace incandescent light bulbs with compact fluorescents bulbs.Especially those burn the longest each day. Compact fluorescents produce the same amount of light as normal bulbs, but use about a quarter of the electricity and last ten times as long. Each switch you make helps clean the air today, curb global warming, and save you money on your electricity bill.Become a smart water consumer.Protecting forests is a big step on the road to curbing global warming. Trees "breathe in" carbon dioxide, but slash-and-burn farming practices, intensive livestock production, and logging have destroyed 90 percent of the native forests in the United States. And you can take action in your own back yard —planting shade trees around your house will absorb COand2, slash your summer air-conditioning bills.Reduce! Reuse! Recycle!Producing new paper, glass, and metal products from recycled materials saves 70 to 90that would result if the product came from percent of the energy and pollution, including CO2virgin materials. Recycling a stack of newspapers only 4 feet high will save a good-sized tree. Please...buy recycled products!Mount a local campaign against global warming.Educate your community about how it can cut global warming pollution. Support measures at the national, state, and local level that:Make automobiles go further on a gallon of gas;Accelerate the use of clean, renewable energy sources, such as solar and wind;Increase energy efficiency and conservation;Preserve forests around the world.Step VIII HomeworkPick out the reporting verbs in the text.11。
高中英语 Unit 22 Environmental Protection 背景知识拓展 北师大版选修8
Unit 22 Environmental ProtectionEnvironmental problemsEnvironmental problems are becoming more and more se rious all over the world. With the development of industry and agriculture, cars make great noises and give off poisonous gas. Trees on the hills have been cut down, and waste water is being poured continuously into rivers. Furthermore, wherev er we go today, we can find rubbish carelessly disposed. The whole ecological balance of the earth is changing. Massive destruction of environment has brought about negative effects and even poses a great threat to man's existence.There are still many problems of environmental protection in recent years. One of the most serious problems is the serious pollution of air, water and soil. The polluted air does great harm to people’s health. The polluted water causes diseases and death. What is more, vegetation has been greatly reduced with the rapid growth of modern cities.To protect the environment, governments of many countries have done a lot. Legislative steps have been introduced to co n trol air pollution, to protect the forest and sea resources and to stop any environmental pollution. Therefore, governments are playing the most important role in the environmental protection today.In my opinion, to protect environment, the gove rnment must take even more concrete measures. Firstly, it should let people fully realize the importance of environmental protection through education. Secondly, much more efforts shou ld be made to put the population planning policy into practice, because more peopl e means more pollution. Finally, those who destroy the environment intentionally should be severely punished. We should let them know that destroying environ ment means destroying mankind themselves.As we all know, there is only one earth. The environment must be linked with social ethics, character education and practice acts Everyone must fulfil his responsibilities and obligations to protect the environment.环境问题全世界的环境问题正变得越来越严重。
《Environmental Protection》教案2(北师大版选修8)
Unit 22 Environmental ProtectionLesson 2 Endangered Species---教案Teaching aims1.Words and phrases：2. Listening: a lecture and a dialogue and take notes3. To practise justifying arguments.Teaching timeTwo periods(两课时连堂)Teaching processStep 1 RevisionReview the new words of last lessonStep 2 Learn the new wordsStep 3 Listening1. Before you starta) Exercise 1: Match the names of the endangered species with the pictures.Ask students to look at the pictures and do the exercise individually.Then go through the pictures and check answers.b) Exercise 2Students look at the words and explain the meaning of the words.Then do the exercise on the blackboard.2. Listen to learna) Ask students to look at the listening strategies and review them together.b) Listen to the tape, do exercise 3. Let students write some notes.c) Exercise 4: Students work in pairs and use their notes to make sentences in turn.d) Check their answers.e) Exercise 5: Have a few pairs of students compare their notes. Let them tell the most important information that they got from the lecture.f) Exercise 6.play the tape, ask the students to complete the fact files, then go through the fact files with the class.Step 4 VocabularyExercise 7Ask students to do the exercise individually and then check their answersStep 5 Pronunciation1. Exercise 8: Play the cassette again. Ask students to pay attention to compound words.2. Ask them to read out the compound words they heard.3. Exercise 9: Listen to the dialogue and complete the function file with these expressions.4. Play the cassette and do the exercise, then ask students to read the sentences.Step 6 Speaking1. Ask students to read the information in exercise 10.2. Go through the key words with students in exercise 11. Ask students to note down their priorities and solutions to the problems.Step 7 HomeworkExercise 2 in page 54。
北师大版高中英语选修八 Unit22 environmental protect-语法篇(教师版)
Unit 22 Environmental Protection语法篇____________________________________________________________________________________________________________________________________________________________________1、掌握直接引语与间接引语||，现在完成时的被动语态||，非谓语动词的被动语态||。
2、灵活运用直接引语与间接引语||，现在完成时的被动语态||，非谓语动词的被动语态||。
直接引语与间接引语一、概念引述别人的话时||，一般采用两种方式：一是引用别人的原话||，把它放在引号内||，称为直接引语；二是用自己的话加以转述||，被转述的话不放在引号内||，称为间接引语||。
间接引语在大多数情况下是一个宾语从语||。
直接引语变成间接引语时||，要注意以下几点：人称变化、时态变化、宾语从句要用陈述语序||。
例如：直接引语：He said||，“I want to have a drink now.”间接引语：He said that he wanted to have a drink then.二、变身方法1.人称变化：口诀：一主二宾三不变||。
即直接引语的第一人称取决于主句的主语||，第二人称取决于主句的宾语||，第三人称一般不变||。
1）He said||，“I get on well with people here.”→He said that he got on well with people there.2）Susan said||，“We can finish the work tomorrow.”→Susan said that they could finish the work the next day.3）John said||，“Mary went to Beijing three days ago.”→John said that Mary had gone to Beijing three days before.2.时态变化：口诀：主句现在从不变||，主句过去从顺延||。
北师大高中英语选修八高二下Unit22《EnvironmentalProtection》(Lesson1)ppt课件
Traffic Jam
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Factory
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The Greenhouse Effect
The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60ºF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.
Taking action on global warming (or climate change) is similar. In some cases, it only takes a little change in lifestyle and behavior to make some big changes in greenhouse gas reductions. For other types of actions, the changes are more significant. When that action is multiplied by the 1.3 billion people in the China. Or the 6 billion