环境保护PPT(英文版).ppt

1、Environmental Protection,Environment is the things around the center of things,The law of Environmental Protection,Environment is : air, water, land, minerals, forests grasslands, wildlife (野生动植物) aquatic flora and fauna(水生动植物) historical sites, scenic areas nature reserves, residential areas,What i

2、s happening on the earth every second, 2.4 Neonates born in the world. extracted 28.6 tons of metal. produce 1.3 cars. CO2 emissions of 760 tons worldwide. Decrease of 0.6 square kilometers forest.,The worlds top ten environmental problems, 1.Global warming-全球变暖 2.Ozone layer depletion-臭氧层破坏 3.Loss

3、of biodiversity-生物多样性减少 4.The spread of acid rain-酸雨蔓延 5.Forest dropped-森林锐减, 6.Desertification-土地荒漠化 7.Air pollution-大气污染 8.Water pollution-水体污染 9.Marine pollution-海洋污染 10.Cross-boundary movements of poisonous wastes-毒性废弃物越境转移,NO.1 Global warming,Gradually increasing the greenhouse effect, Earths t

4、emperature rising. Main hazards(危害): abnormal weather, species extinction, the sea level rising., Ozone (O3) layer: the Earths protective layer Main hazards: strong UV (ultra-violet ray紫外线) radiation can damage immune system（免疫系统） of human natures and animals , cause skin cancer and cataracts（白内障）,

5、damage to the earths ecosystems（全球生态系统）.,NO.2 Ozone layer depletion,NO.3 Loss of biodiversity,NO.4 The spread of acid rain, Global extinction of 50,000 species / year, 140 / day on average., pH 5.6 referred as acid rain. Main hazards: Water and soil acidification(酸化), plant and animal death, corrosi

6、on(腐蚀) buildings, railways and bridges and other facilities.,NO.5 Forest dropped,NO.6 Desertification, Huge numbers of global deforestation., 600 million square kilometers of land into desert each year.,NO.7 Air pollution, Sulfide and nitrogen oxides(硫化物和氮氧化合物) into the atmosphere worldwide up to 30 million tons each year.,NO.8 Water pollution, About 40% of the worlds rivers are seriously polluted. Freshwater（淡水）resources are becoming exhausted.,NO.9 Marine pollution,NO.10 Cross-boundary movements of poisonous wastes, Hundreds of tons of silt and waste(淤泥和废弃物) into the coastal w