Unit 3 Environmental Protection Reading and Thinking 课件-2025-2026学年高中英语人教版（2019）选择性必修第三册

Climate change requires the world's attention Unit3 Environmental Protection Reading and Thinking 1 1. What’s happening in the photo? The photo is of a large piece of ice breaking off a large glacier or ice sheet. 2. Where do you think this photo was taken? This photo was taken in either the Arctic or Antarctica. 3. What does this photo make you think of? The photo makes me think of the problem of global warming. Look and discuss Before Pre-reading: Lead in What happened to the polar bear in the video? CLIMATE CHANGE REQUIRES THE WORLD’S ATTENTION Expository essay The authors sometimes use some graphs or diagrams in their essays in order to convince their readers. These graphs and diagrams often come from scientific reasearch reports and other reliable resources. Activity1：Read for the text type 1. What's the type of this text? A. News report. B. Biography. C. Expository essay. D. Argumentation. 2. What's its purpose? To inform readers of climate change. To persuade readers to focus on climate change problem. 1. What is the graph about? What information can you get from it? 2. What do you think might have caused the polar bear’s death? The graph shows the change in the Global Surface Temperature between 1920 and 2016. It shows the temperature anomaly（平均气温距平值 ）. The Earth is getting warmer and warmer. Activity2：make a prediction Activity3:Read for main idea& structure Find out the topic sentence of each paragraph. evidence example causes consequences solutions problem---solution pattern The structure evidence consequences causes solutions Para1: We have known about climate change for decades. There is little doubt that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate ocean and atmosphere warming ice melting sea levels rising dramatic global climate change clearly demostrate provide evidence of earth warmer What evidence does the author provide to prove global warming? cause ____________________________________________________ ____________________________ effect Activity3: Read for problem---solution pattern _____________________________ Para2: In 2013, a lot of people were shocked by a news photo of a dead polar bear that was found on Norway’s Arctic island of Svalbard. According to the scientists who found its dead body, all that remained of the polar bear was "skin and bones". An expert who has studied polar bears for many years said that from the position of its dead body, the bear appeared to have starved and died. Experts claimed that low sea-ice levels caused by climate change meant that the bear could not hunt seals as before, so it had to travel greater distances in order to find food. This alarming case showed how the increase in temperature had an impact on Earth’s ecology. climate change low sea-ice levels could not hunt travel farther for food starved and died According to the scientists,what is the root cause of the polar bear’s death? __________________________________________________ ____________________________________________ Para3: Then what is causing the increase in the global average surface temperature? Climate scientists often mention a key climate process called the "greenhouse effect" which has two common meanings: the "natural greenhouse effect" and the "man-made greenhouse effect". What are the causes of the increase in the global temperature? “Natural” greenhouse effect “man-made” greenhouse effect Greenhouse effect sun enter (short-wave radiation) atmosphere earth’s surface warms heat long wave Greenhouse gases in the atmosphere keep Earth's climate warm and habitable The "natural" greenhouse effect refers to the fact that heat from the sun enters the atmosphere and warms Earth's surface as short-wave radiation. The heat is released back into space at longer wavelengths. Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Earth's climate warm and habitable. Without this process, Earth could not sustain life. short wave wavewave enters is released back into space trap some of the heat How does the "natural"greenhouse effect work? Para 4 However, the "man-made greenhouse effect" has now become a big problem. When people produce huge amounts of extra greenhouse gases by burning fossil fuels, more heat energy is trapped in the atmosphere and causes Earth's surface temperature to rise. ↓ ↓ ↓ produce is trapped fossil Fuel Burning huge amounts of extra greenhouse gases (↑) more heat earth’s surface temperature rises (↑) (↑) How does the "man-made greenhouse effect" work? problem!! The rise in temperature extreme weather natural disasters serious damage, costing human lives, economic losses leads to examples results What are the consequences of the global temperature rise? extreme rainstorms, heat waves There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. Climate scientists have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a higher price to pay. In fact, news reports are frequently broadcast about extreme rainstorms and heatwaves causing deaths and economic losses. causing In fact in fact （事实上，加强论证）indeed （的确，加强前文） for example ,for instance ,such as 14 What can be done to solve the global warming? Para 5 solutions governments make policies take appropriate actions and measures individuals reduce our “carbon footprint” by… educate everyone about global warming Continued greenhouse gas emissions will result in further warming and long-lasting changes to the global climate. This requires the attention of people all over the world. Governments need to consider making policies and taking appropriate actions and measures to reduce greenhouse gas emissions. We as individuals can also reduce our "carbon footprint" by restricting the amount of carbon dioxide our lifestyles produce. It is our responsibility to seize every opportunity to educate everyone about global warming, along with its causes and impacts, because this is the most serious issue affecting all of us on this planet.So what will you do to help? 15 Read and think What writing techniques does the author use ? 各个方法请结合文本的具体体现 using a graph using an example asking a question making an explanation making a comparison leaving a question writing techniques Who is more likely to blame for climate ? Any reasons ? Sort the garbage Abate the use of plastic bags Value our own role End wasting resources Encourage others to paticipate in it Alter our lifestyle Ride a bike or walk to school Turn off all electric devices when not in use Help inform those around the danger of global warming ... Discuss As an individual, what can we do to deal with the climate change? Earth provides enough to satisfy every man's needs, but not every man's greed. ------Mohandas K.Gandhi A Conclusion Together, let's return green to the earth ! Thank You 21 Lavf58.20.100 Packed by Bilibili XCoder v2.0.2 $