高中地理选择修读6第2课时第二节.ppt

第二节　固体废弃物污染及其危害 第二章　环境污染与防治 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 新课学前导航 情景导入 目前中国城市生活垃圾累积堆存量已达70亿吨,占地约80万亩,近年来还在以平均每年4.8%的速度持续增长.在填埋、堆肥以及焚烧等三种垃圾处理方式中,中国主要采用填埋处理. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 填埋比例过高会带来垃圾的二次污染,而且消耗大量土地资源,垃圾填埋所消耗的土地资源,已经成为城市发展中的“不能承受之重”. 【思考】　城市生活垃圾来源有哪些?如何处理? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 目标定位 1.结合实例分析、理解城市垃圾的特点,树立垃圾分类减量的意识. 2.通过案例分析,理解固体废弃物的污染途径和防治措施. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 一、城市垃圾的特点1．数量大:城市垃圾的数量随______________而增加.2．品种多:城市垃圾是多种废弃物的混合物. 生活水平的提高 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3．变化大:随着生活水平的提高与新产品的推广,城市垃圾出现了新的品种,如家用电器、废旧汽车、电脑等.本特点从另一个侧面反映出城市垃圾的产生与人类社会经济发展的关系. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 思考 1．为什么说现代工业的发展提高了垃圾的危害性? 【提示】　现代工业科技,尤其是化学工业的快速发展,导致垃圾成分发生了重大变化,极大地增加了垃圾处理的难度,因此也提高了垃圾的危害性. 　 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Pr