人类破坏环境ppt.pptVIP

* * These are the ideal environment that we wish to live in But actually, the environment in which we live is very bad. Environmental analys is Air pollution Air pollution is becoming a severe problem, which mainly caused by transport action and factories production. The air pollution changes the conditions that we depend on ,such as the greenhouse effect and the acid rain. It causes many diseases too. Atmospheric pollutants now known to about 100. Natural factors (such as forest fires, volcanic eruptions, etc.) and human factors (such as industrial emissions, life coal burning, vehicle exhaust, explosions, etc.) two kinds, and the latter is mainly caused by industrial production and transportation Undo edits. 大气污染物目前已知约有１００多种。有自然因素（如森林火灾、火山爆发等）和人为因素（如工业废气、生活燃煤、汽车尾气、核爆炸等）两种，且以后者为主，尤其是工业生产和交通运输所造成的. Water pollution Polluted rivers Dead fish The phenomenon of the pollutants go to rivers, lakes , seas and underground water, it makes the water quality and sediment of the physical, chemical or biological community composition changes, reduce the water using value and function . 水污染：污染物进入河流、湖泊、海洋或地下水中，使水质和底泥的物理、化学性质或生物群落组成发生变化，降低了水体的使用价值和功能的现象. White pollution A large number of forests have been sacrificed for urban development.? As we all know, trees are able to help clean the air.? Furthermore, we are killing animals while cutting down these trees.? As a result, many animal species are dying out.?Air pollution is getting worse, which can cause many diseases.? people still go on cutting down trees. 为了城市发展大量的森林都被砍伐。我们都知道,树木能够有助于洁净空气。此外,我们砍伐树的同时也正在杀死动物。因此,许多动物濒临灭绝。空气污染越来越严重,它可以引起许多疾病。人们仍然继续砍伐树木。 So what should we do? Use green shopping bags instead of plastics Turn off the light before you get out Raise the temperature of air-conditioning The beautiful planet is our home. To take care of the world is to take care of ourselves. Let’s work together to keep our world alive and well. * * *