Air Pollution
Industry waste gas
Nuclear explosion
Waste gas of cars and so on
How the polluted air do harm to us?
1.Access the body directly through our respiration(呼吸)
Key speaker
Introduction
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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 clean air, but unfortunately, air pollution is globally present, especially in cities.
Look at these
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We couldn’t imagine how can we survive in these circumstance.
Air pollutants such as nitrogen dioxide and sulphur dioxide also have harmful effects on natural ecosystems.
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.
They can kill plants and trees by destroying their leaves, and can kill animals, especially fish in highly polluted rivers.
Look at their eyes ….
How poor…
2.Get into the body with the food we eat
3.Access to the body through touching or stimulating our skin (most) When it access to our body it could damage our health!
1.What are the three main reasons of the air pollution ? 2.What is our topic today ?
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