Unit 6 Period 4 Developing ideas-【金版教程】2023-2024学年新教材高中英语必修第二册作业与测评课件PPT（外研版2019）

Unit 6 Earth first Period 4 　Developing ideas 目录 CONTENTS 目录 Ⅰ　阅读 The San Diego County Water Authority has an unusual plan to use the city's San Vicente Reservoir (水库) to store solar power. The project could help unlock America's clean energy future. 目录 Perhaps ten years from now, large underground pipes will connect the lake to a new reservoir built about 1，100 feet higher. When the sun is high in the sky, California's rich solar power will pump water into that upper reservoir. When the sun goes down, the force of water would produce 500 megawatts (百万千瓦) of electricity for up to eight hours. “It's a water battery！” says Neena Kuzmich, director of engineering for the water authority. The technology that San Diego puts forward is already in use at more than 40 sites in the US. Some of them were built during the 1970s to store electricity produced by nuclear power plants. Now, the need to store power from renewable sources is bringing this old technology back. 目录 Water batteries have many competitors, when it comes to storing energy. However, they have their own advantages. Water batteries are a proven way to store large amounts of power. The San Vicente project would store about as much electricity as the batteries in 50，000 of Tesla's Model 3 cars. They also don't require hard­to­find battery materials. The biggest problem with them is that it is hard to find places to build them. They need a great deal of water, land to build two reservoirs and permission to damage the landscape. 目录 Kelly Catlett, director of an environmental organization, says, “We won't support projects that build new damns on rivers and damage ecosystems. But San Diego's plan looks like something different, because it uses an existing reservoir and doesn't damage any streams.” 篇章导读：本文是一篇说明文。文章介绍了美国圣地亚哥水务局计划利用圣维森特水库储存太阳能，解决美国未来的清洁能源问题。 目录 1．What's the main idea of Paragraph 2? A．What a water battery is. B．How the project will work. C．Why reservoirs are needed. D．What the clean energy futu