Air pollution,(空气污染ppt课件.ppt

1、Air Pollution,Key speaker,1,Introduction,We all know that clean air is important to good health. Wherever you go and whatever you do, you are always surrounded by a sea of gases that we call air. If there are impurities(杂质) in the air, they may be absorbed by our bodies and make us ill. We need clea

2、n air, but unfortunately, air pollution is globally present, especially in cities.,2,3,4,How the polluted air do harm to us?,1.Access the body directly through our respiration(呼吸),2.Get into the body with the food we eat,3.Access to the body through touching or stimulating our skin (most),When it ac

3、cess to our body it could damage our health!,5,We couldnt imagine how can we survive in these circumstance.,Look at these,6,Air pollutants such as nitrogen dioxide and sulphur dioxide also have harmful effects on natural ecosystems.,They can kill plants and trees by destroying their leaves, and can

4、kill animals, especially fish in highly polluted rivers.,ACID RAIN,7,Look this children!Their eyes are filled with hope!,8,Look at their eyes .,How poor,9,On the whole, the elimination（排除） of air pollution needs the co-efforts（努力） from the government, the public and the environments. This problem will be solved only with the help of science and technology.,10,Please answer our questions,1.What are the three main reasons of the air pollution ? 2.What is our topic today ?,11,When