文档介绍：E nvironmental P rotection E nvironment is the things around the center of things The law of Environmental Protection E nvironment 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 is happening on the earth every second ● Neonates born in the world. ● extracted tons of metal. ● produce cars. ●C O 2 emissions of 760 tons worldwide. ● Decrease of square kilometers forest. The world's top ten environmental problems ◆ 1. Global warming ---全球变暖◆ 2. Ozone layer depletion- --臭氧层破坏◆ 3. Loss 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 Global warming ◆ Gradually increasing the greenhouse effect, Earth's temperature rising. ◆ Main hazards (危害): abnormal weather, species extinction , the sea level rising. ◆ Ozone (O 3 ) layer: the Earth's 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) , damage to the earth ’ s ecosystems (全球生态系统) . Ozone layer depletion Loss of biodiversity The spread of acid rain ◆ Global extinction of 50,000 species / year, 140 / day on average. ◆ pH < referred as acid rain. ◆ Main hazards: Water and soil acidification (酸化), plant and animal death , corrosion (腐蚀) buildings, railways and bridges and other facilities. Forest dropped Desertification ◆ Huge numbers of global deforestation . ◆ 600 million square kilometers of land into desert each year. 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. Wat