环境保护英语演示文稿.ppt
《环境保护英语演示文稿.ppt》由会员分享,可在线阅读,更多相关《环境保护英语演示文稿.ppt(39页珍藏版)》请在三一文库上搜索。
1、Caring for Our Earth,Air pollution Water pollution Past and today The pollutions effect on us What should we do,Air pollution,What the pollution caused by?,1. nature problem. 2. peoples duty.,The pollution in cities,Air pollution is at its worst over big cities where millions of people live, work, a
2、nd travel about in cars, buses, and trucks. Factory chimneys can be fitted with devices to cut down air pollution, but this is expensive. If better pubic transport and cycle lanes were available in towns and cities, people would be less likely to use their cars, reducing the overall amount of pollut
3、ion.,Smoking cigarettes,Smoking cigarettes adds to the general levels of air pollution as well as damaging our health. Cigarette smoke contains chemicals that can cause cancer, a gas which stops oxygen being taken into the blood and a substance called nicotine, which raises blood pressure and makes
4、the heart beat faster. No-smoking areas cut down on this pollution and save non-smokers breathing in other peoples cigarette smoke.,Some point about air pollution,1.Air pollution index.(API),2. Particulate matter (PM2.5),Air pollution index is a group of numbers which show how serious the air pollut
5、ion is.,A kind of statistics about the diameter of matters we can breathe in.,The most important element of the air pollution,1.carbon dioxide(CO2) 2.carbon monoxide(CO) 3.suldur dioxide(SO2) 4. ,Kyoto Protocol!,What is the reaction of our countries over the world?,What is the Kyoto Protocol?,The Ky
6、oto Protocol was an agreement negotiated by many countries in December 1997 and came into force with Russias ratification on February 16, 2005. The reason for the lengthy time span between the terms of agreement being settled upon and the protocol being engaged was due to terms of Kyoto requiring at
7、 least 55 parties to ratify the agreement and for the total of those parties emissions to be at least 55% of global production of greenhouse gases.,Kyoto - success or failure?,The Kyoto Protocol, while well intentioned, would appear to be doomed to failing its objectives even before the 2008-2012 av
8、eraging period commences. Carbon dioxide levels in the atmosphere are rising at a frightening rate with no sign of slowing. Global temperatures are continuing to rise.,Kyoto - success or failure?,The science behind Kyoto was shaky due to the limited availability of crucial data and knowledge at the
9、time; particularly in regard to positive feedback loops in nature being revealed that amplify warming and prevent carbon dioxide from being absorbed. Scientists studying global warming are finding Nature fighting back in ways they never contemplated daily.,Kyoto - success or failure?,Kyoto should be
10、 viewed as a stepping stone to more drastic action. And that action is required now.,Water protection,We all know that water is very important in our life.,All kinds of beautiful water,Water scarcity and pollution has become one of the most important things in recent years. In this chapter well disc
11、uss both fresh water and wastewater treatment, either for reuse or disposal in the environment “without polluting it. “,Drought,Pollution,N O W,Approximately 300 million nationwide have no access to clean water. Furthermore, over 700 million Chinese drink fetid water below World Health Organization
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 环境保护 英语 演示 文稿
链接地址:https://www.31doc.com/p-2980616.html