Unit 2 Topic 3 Section C课件2023-2024学年仁爱科普版九年级上册

Unit 2 Saving the Earth Topic 1 What can we do at home to protect the environment? Section C Learn some new words and phrases. Get to know: acid, nuclear, biogas, straw, renewable, disadvantage, process, electric, best-known, maglev train, per, efficient, path, steel, wave, source, run out, worldwide, sunlight, steam Be able to use: technology, require, German, wheel, guide, deep Be able to use some useful expressions. (1)In many countries, people produce power from coal, but it is very dirty and causes acid rain. (2)They will never run out so they are called renewable sources. Talk about the advantages and disadvantages of some kinds of energy. Language goals How can we become a greener person? Turn off the lights when we leave a room. Walk or ride a bike instead of taking a bus or a taxi. Take a cloth bag when we go shopping. Don’t drive a car if you travel a short distance. Write on both sides of the paper. Don’t use the things that can be used only once. After we wash faces, we can use the water to wash clothes. Turn off the TV set while we are away. … section B Review 1a Read and understand. Look at the pictures. Do you know what they are? Choose the right picture for each paragraph. Paragraph 2 Paragraph 3 Paragraph 4 Learning In many countries, people produce power from coal, but it is very dirty and causes acid rain. Some countries use nuclear energy to produce power. However, nuclear power can be very dangerous. To solve the energy problem, people all over the world are looking for new ways to produce power. China is one of the first countries in the world to use biogas technology. Farmers recycle straw, grass and animal waste to make biogas. This renewable energy is used in people’s everyday lives. Its key disadvantage is that the process requires a long time (up to 30 days) and the cost is high. Learning Electric vehicles were developed in the 1990s. On April 11, 2010, a new kind of electric vehicle named “Yezi” was sh