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环境污染的危害“两个黄鹂鸣翠柳，一行白鹭上青天”，这是唐朝诗人杜甫赞美大自然的名句。
可是现在一些地方由于环境污染的危害，已经见不到这样的美景了。
环境污染不仅破坏了生物的生存环境，而且直接威胁着人类的健康。
1．环境污染对生物的不利影响环境污染对生物的生长发育和繁殖具有十分不利的影响，污染严重时，生物在形态特征、生存数量等方面都会发生明显的变化。
下面分别讲述环境污染在酸雨、有害化学药品、重金属和水体富营养化四个方面对生物的危害。
①．酸雨对生物的危害酸雨使土壤和河流酸化，并且经过河流汇入湖泊，导致湖泊酸化。
湖泊酸化以后不仅使生长在湖中和湖边的植物死亡，而且威胁着湖内鱼、虾和贝类的生存，从而破坏湖泊中的食物链，最终可以使湖泊变成“死湖”。
酸雨还直接危害陆生植物的叶和芽，使农作物和树木死亡。
现在，酸雨造成的危害日益严重，已经成为全球性环境污染的重要问题之一。
二氧化硫是形成酸雨的主要污染物之一。
随着经济的发展，人类将燃烧更多的煤、石油和天然气，产生更多的二氧化硫等污染物，因此，今后酸雨造成的危害有可能更加严重。
我国是世界上大量排放二氧化硫的国家之一，一些地区已经出现了酸雨。
例如，我国西南某地区，1982年的三个月内就降了四次酸雨，雨水的pH为3.6～4.6，致使大面积的农作物受害。
早在19世纪中叶，人们就注意到地衣和苔藓植物不能在空气污染严重的城市中存活，烟囱附近的植物叶片往往出现病斑。
科学家们经过研究后发现，这些现象都与该地区的大气污染有关，并且可以利用一些植物来监测某个地区大气污染的状况。
不同的植物对二氧化硫等大气污染物的敏感程度不同。
例如，大气中二氧化硫的含量比较高时，紫花苜蓿、向日葵等的叶片就会很快褪绿，或者叶脉间出现褐色斑块，严重时叶片逐渐坏死。
这些植物对大气污染反应敏感，可以用来监测大气污染的状况，叫做大气污染指示植物。
②．有害化学药品对生物的危害农药是一类常见的有害化学药品。
人们在利用农药杀灭病菌和害虫时，也会造成环境污染，对包括人类在内的多种生物造成危害。
外研版英语九上Module 12《Save our world》模块说课稿一. 教材分析《外研版英语九上Module 12 Save our world》是一篇关于环保的课文，主要讨论了全球环境问题以及我们每个人应该如何为保护地球环境做出贡献。
本模块包括三个部分：阅读理解、词汇学习和语法讲解。
通过本模块的学习，学生可以提高自己的阅读理解能力，扩展词汇量和语法知识，同时增强环保意识。
二. 学情分析九年级的学生已经具备了一定的英语基础，能够理解和运用所学知识进行简单的交流。
但是，对于一些复杂的环保相关词汇和语法结构，学生可能还需要进一步的引导和帮助。
此外，学生可能对环保这个主题有一定的了解，但深入的知识和实际操作能力还有待提高。
三. 说教学目标1.知识目标：学生能够理解Module 12中的阅读材料，掌握相关环保词汇和语法结构。
2.能力目标：学生能够运用所学知识进行环保主题的阅读理解和写作。
3.情感目标：学生能够提高环保意识，意识到自己每个人都有责任保护地球环境。
四. 说教学重难点1.重点：学生能够理解和运用Module 12中的阅读材料，掌握相关环保词汇和语法结构。
2.难点：学生能够运用所学知识进行环保主题的阅读理解和写作。
五. 说教学方法与手段1.教学方法：采用任务驱动法，让学生在实际操作中学习和运用知识。
2.教学手段：利用多媒体课件和网络资源，丰富教学内容和形式。
六. 说教学过程1.引入：通过展示一些环保问题的图片，引导学生思考环保的重要性，激发学生的学习兴趣。
2.阅读理解：学生阅读Module 12的阅读材料，回答相关问题，教师引导学生进行讨论和解答。
3.词汇学习：学生学习Module 12中的环保相关词汇，教师进行解释和例句展示。
4.语法讲解：教师讲解Module 12中的相关语法结构，学生进行练习和应用。
5.小组讨论：学生分组讨论如何为保护地球环境做出贡献，每组给出具体的建议。
6.写作练习：学生根据所学知识和讨论结果，撰写一篇关于环保的短文。
Save Our WorldOur world is facing numerous challenges that threaten its very existence. From pollution and deforestation to climate change and the loss of biodiversity, it is clear that urgent action is needed to save our planet.Pollution is one of the major problems. Factories and vehicles release harmful gases and chemicals that dirty the air we breathe and the water we drink. To combat this, we should promote the use of clean energy sources like solar and wind power. We also need to enforce strict regulations on industrial emissions and encourage people to use public transportation or cycle instead of driving alone.Deforestation is another critical issue. Trees are being cut down at an alarming rate, destroying the habitats of countless species and contributing to climate change. We must support reforestation efforts and ensure that forests are protected.Climate change is perhaps the greatest threat of all. Rising temperatures are causing extreme weather conditions, melting glaciers, and rising sea levels. We can all do our part by reducing our carbon footprint. This includes conserving energy at home, using less plastic, and eating less meat.Saving our world is not just the responsibility of governments and big organizations; it is the duty of each one of us. Every small action counts. If we all work together, we can make a difference and ensure a sustainable future for generations to come.Save Our WorldThe Earth is our home, but it is in danger. It is our responsibility to save it and ensure a better future for ourselves and the coming generations.One of the biggest threats to our world is plastic pollution. Plastic waste is everywhere – in our oceans, on our land, and even in the air. We need to reduce our use of plastic and properly dispose of it. We can carry reusable bags when shopping and avoid single-use plastic items like straws and cups.Another significant issue is the depletion of natural resources. We are consuming resources at an unsustainable rate. We should recycle and reuse as much as possible. For example, we can recycle paper, glass, and metal to save energy and reduce waste.Conservation of wildlife is also crucial. Many species are on the verge of extinction due to habitat loss and illegal hunting. We must support wildlife protection organizations and advocate for stronger laws to protect endangered animals.In addition, we should promote sustainable agriculture. This means using methods that do not harm the environment, such as organic farming and conserving water.Let's all take steps to save our world. It's not too late to make a change and create a cleaner, healthier planet.**作文三】Save Our WorldOur world is in peril, and it is up to us to save it. The environment is deteriorating at an alarming rate, and if we do not act now, the consequences will be disastrous.Global warming is a serious problem that we must address. The burning of fossil fuels is releasing large amounts of greenhouse gases into the atmosphere, trapping heat and causing the planet to warm. We can switch to renewable energy sources like solar and hydro power. We should also plant more trees as they absorb carbon dioxide and give out oxygen.Water pollution is another major concern. Chemicals and waste from factories and agriculture are contaminating our rivers, lakes, and oceans. We need to treat wastewater before it is released into the environment and be more careful about the use of pesticides and fertilizers.The overuse of natural resources is also taking a toll on our planet. We should be more conscious of our consumption and try to live a more minimalist lifestyle. For instance, we can repair broken items instead of throwing them away and buy only what we truly need.Everyone has a role to play in saving our world. Let's make small changes in our daily lives and together, we can make a big difference.作文四Save Our WorldThe Earth is crying out for help, and it is our duty to respond. Our actions today will determine the fate of our world tomorrow.One of the key areas where we need to focus is energy consumption. We rely too much on non-renewable sources of energy that are not only finite but also harmful to the environment. We should invest in and utilize more sustainable options like solar and wind energy. At home, we can turn off lights and appliances when not in use to save electricity.The waste we produce is also a major problem. Landfills are overflowing with garbage, and much of it is not biodegradable. We need to reduce, reuse, and recycle. By doing so, we can minimize the amount of waste that ends up in landfills and conserve valuable resources.Protecting our forests is of utmost importance. They are the lungs of our planet, providing oxygen and absorbing carbon dioxide. We should stop deforestation and support reforestation efforts.If each of us takes responsibility and makes conscious choices to protect the environment, we can save our world and leave a beautiful planet for future generations.作文五Save Our WorldOur world is facing numerous environmental challenges that require immediate attention and action. It is our collective responsibility to save it and ensure its survival for future generations.The rapid growth of industries and urbanization has led to a significant increase in air pollution. Smog-filled cities are becoming the norm, causing respiratory problems and other health issues. We need to impose stricterregulations on industrial emissions and promote the use of clean technologies.Soil erosion and desertification are also serious problems. Uncontrolled farming practices and deforestation have damaged the soil. We should adopt sustainable agricultural methods and plant trees to prevent soil erosion.The loss of biodiversity is another critical issue. Many species are becoming extinct due to human activities. We must protect their habitats and stop illegal hunting and logging.Saving our world is a challenging task, but it is not impossible. With awareness, determination, and collective efforts, we can create a sustainable and healthy planet.**作文六】Save Our WorldOur world is in a critical state, and it is essential that we take steps to save it. The damage we have caused to the environment is becoming increasingly evident and urgent action is needed.One of the main problems is the excessive use of chemicals in agriculture. These chemicals seep into the soil and water, poisoning the ecosystem. We should encourage organic farming and natural pest control methods.Another issue is the improper disposal of electronic waste. Old electronics contain harmful substances that can harm the environment and human health. We need to establish proper recycling facilities for e-waste.Marine pollution is also a significant concern. Plastic debris is choking our oceans and harming marine life. We should reduce our plastic consumption and participate in beach clean-ups.Let's come together and do our part to save our world. It's the only home we have.。
Module 12 Save our world【教学内容分析】本模块以环境污染以及环保为话题。
本单元是通过工厂污染环境谈论环保，提倡绿色生活，锻炼学生的语言表达能力，并提高学生的环保意识。
通过本单元的听说活动，给学生提供充足的体验和运用语言的机会。
【学情分析】本模块谈论环境污染和环保，污染问题普遍，学生亲身体会比较多，容易调动学生的积极性，激发学生的学习兴趣。
Unit 1If everyone starts to do something, the world will be saved.【教学目标】Knowledge objectiveTo master some words and expressions.Ability objectiveTo understand a conversation about pollution and a green school.Moral objectiveTo learn the crisis of the earth and save the world.【教学重点】1. To learn and review some words and expressions：factory, pollute, recycle, waste, enemy, crop, kill, oil, less, such as, hopeless …2. To learn how to live a green life.【教学方法】PWP method, task-based method and interactive approach【教学手段】A tape recorder, multimedia and some pictures【教学过程】Teaching Procedures:Step 1 Warming upPollution is our great enemy, and we have to fight it. Let Ss watch a video about pollution. Sslook at the pictures and talk about the questions.Step 2 ListeningWork in pairs. Look at the pictures and talk about them. Use the words in the box to help you.Step 3 Listen and complete the sentences.1. The factory is causing a lot of _____________.2. There should be some ________ to stop the pollution.3. We can _______ waste products, such as __________ and paper in a recycling centre.Listen and read.Step 4 Consolidate new wordsLook and say. Look at the pictures of new words and let the students to say as quickly as possible. Step 5 ReadingRead the dialogue and complete the notes.Pollution problems1. If the rivers are polluted, ________________________________________.2. In some places, pollution from factories ___________________________.3. The cars on the roads ________________________________________.What the students can do4. Support a green school: every class ___________ which can be ____________. Then the school _______________________ to help students ________________.5. Students learn _________________________. That means ___________.Step 6 Everyday EnglishIt’s no use …Such as …?Nice idea!Step 7 Language points1. It’s no use talking about things we can’t do.It’s no use doing sth. 做某事没有用处e.g. It’s no use complaining. 抱怨没有用处。
冀教版英语八下Unit 8《Save Our World》单元教学设计一. 教材分析冀教版英语八下Unit 8《Save Our World》的主题是保护地球，内容涵盖了环保的重要性、污染问题、可持续发展等方面。
本单元通过丰富的语言材料，旨在提高学生的环保意识，培养他们热爱大自然、保护地球的责任感。
本单元包括两个读写任务，三个听力任务，两个口语任务和一个语音任务。
教材内容贴近学生的生活，有利于激发他们的学习兴趣。
二. 学情分析八年级的学生已经掌握了英语学习的基本语法和词汇，具备一定的听说读写能力。
他们对环保有一定的认识，但深入了解环保问题的背后原因和解决办法还有待提高。
此外，学生在学习过程中容易出现发音不准确、词汇记忆不牢固等问题。
三. 教学目标1.知识目标：学生能掌握本单元的重点词汇、句型和语法；能正确运用所学知识描述环保问题、表达个人观点。
2.能力目标：学生能听懂、会说、会读、会写与环保相关的句子；能运用所学知识解决实际问题。
3.情感目标：学生增强环保意识，认识到保护地球的重要性，培养热爱大自然、保护地球的责任感。
四. 教学重难点1.重点：本单元的重点词汇、句型和语法。
2.难点：正确运用所学知识描述环保问题、表达个人观点。
五. 教学方法1.任务型教学法：通过设置具有实际意义的任务，激发学生的学习兴趣，提高他们的参与度。
2.情境教学法：创设真实的语言环境，让学生在特定的情境中学习英语。
3.交际教学法：通过小组讨论、角色扮演等活动，培养学生的交际能力。
4.激励评价法：注重过程评价，鼓励学生积极参与，提高他们的自信心。
六. 教学准备1.教学课件：制作课件，展示本单元的重点知识点。
2.教学素材：收集与环保相关的图片、视频、文章等素材。
3.教学设备：投影仪、计算机、音响等设备。
4.分组安排：将学生分成若干小组，便于开展小组活动。
七. 教学过程1.导入（5分钟）利用投影仪展示地球污染的图片，引导学生关注环保问题。
外研版九年级上册《Module 12 Save our world》教学设计一. 教材分析外研版九年级上册《Module 12 Save our world》主要围绕环保主题展开，内容包括全球气候变暖、能源危机、生物多样性保护等。
本模块旨在让学生了解环保问题，提高环保意识，并学会用英语表达相关观点。
教材包括课文阅读、语法讲解、听力练习、写作指导等部分。
二. 学情分析九年级学生已具备一定的英语基础，对日常生活话题有较好的认知。
但部分学生对环保知识了解不足，可能影响对文本的理解。
此外，学生们在英语写作、听力方面存在一定困难，需加强训练。
三. 教学目标1.知识目标：学生能掌握相关环保词汇，如climate change、renewable energy等；了解环保问题的原因、危害及解决办法。
2.能力目标：学生能用英语讨论环保问题，表达个人观点；提高听力、写作能力。
3.情感目标：培养学生环保意识，激发学生关爱地球的热情。
四. 教学重难点1.重点：掌握环保词汇，理解课文内容，提高听力、写作能力。
2.难点：运用所学知识讨论环保问题，提出个人观点。
五. 教学方法1.任务型教学法：通过小组讨论、角色扮演等任务，激发学生学习兴趣，提高口语表达能力。
2.情境教学法：创设环保情境，让学生在真实环境中学习英语。
3.交际式教学法：引导学生参与课堂互动，提高听力、写作能力。
六. 教学准备1.教师准备：提前备课，熟悉教材内容，设计教学活动。
2.学生准备：预习课文，查阅相关资料，了解环保知识。
七. 教学过程教师通过展示地球图片，引导学生关注地球生态环境，激发学生学习兴趣。
2.呈现（10分钟）教师播放课文听力材料，学生跟随录音朗读课文。
教师适时提示重点词汇和句型。
3.操练（15分钟）教师学生进行小组讨论，围绕环保问题展开对话。
学生练习运用所学词汇和句型表达个人观点。
4.巩固（10分钟）教师挑选学生代表进行角色扮演，模拟环保场景。
