环境保护PPT(英文版)

NO.8 Water pollution
◆ About 40% of the world’s rivers are seriously polluted. ◆ Freshwater（淡水）resources are becoming exhausted.
NO.9 Marine pollution
◆ Hundreds of tons of silt and waste(淤泥和废弃物)
What is 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.
into the coastal waters annually.
Nwenku.baidu.com.10 Cross-boundary movements of
poisonous wastes
◆ Toxic waste-induced cancers.
环境问题 触目惊心 保护环境 人人有责
Thank you !
NO.1
Global warming
◆Gradually increasing the greenhouse effect, Earth's
temperature rising. ◆ Main hazards(危害): abnormal weather, species extinction, the sea level rising.
Water and soil acidification(酸化), plant and animal death, corrosion(腐蚀) buildings, railways and bridges and other facilities.
NO.5
Forest dropped
◆ Huge numbers of global deforestation.
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
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
NO.3
Loss of biodiversity
◆ Global extinction of 50,000 species / year,
140 / day on average.
NO.4
The spread of acid rain
◆ pH <5.6 referred as acid rain. ◆ Main hazards:
NO.2
Ozone layer depletion
◆ Ozone (O3) 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）.
NO.6 Desertification
◆ 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.